Excel 2010[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TH][/TH]
[TH]A[/TH]
[TH]B[/TH]
[TH]C[/TH]
[/TR]
[TR]
[TD="align: center"]1[/TD]
[TD]File form insurance[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[/TR]
[TR]
[TD="align: center"]2[/TD]
[TD]Beth Green[/TD]
[TD="align: right"]1234[/TD]
[TD]123-13-1234[/TD]
[/TR]
[TR]
[TD="align: center"]3[/TD]
[TD]Rick Grimes[/TD]
[TD="align: right"]3214[/TD]
[TD]312-74-3214[/TD]
[/TR]
[TR]
[TD="align: center"]4[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[/TR]
[TR]
[TD="align: center"]5[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[/TR]
[TR]
[TD="align: center"]6[/TD]
[TD]your file[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[/TR]
[TR]
[TD="align: center"]7[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD]helper column[/TD]
[/TR]
[TR]
[TD="align: center"]8[/TD]
[TD]Beth Green[/TD]
[TD]123-13-1234[/TD]
[TD="align: right"]1234[/TD]
[/TR]
[TR]
[TD="align: center"]9[/TD]
[TD]Rick Grimes[/TD]
[TD]312-74-3214[/TD]
[TD="align: right"]3214[/TD]
[/TR]
</tbody>[/TABLE]
Sheet4
[TABLE="width: 85%"]
<tbody>[TR]
[TD]
Worksheet Formulas[TABLE="class: grid, width: 100%"]
<tbody>[TR]
[TH="width: 10"]Cell[/TH]
[TH="align: left"]Formula[/TH]
[/TR]
[TR]
[TH="width: 10"]C8[/TH]
[TD="align: left"]=RIGHT(
B8,4)[/TD]
[/TR]
[TR]
[TH="width: 10"]C9[/TH]
[TD="align: left"]=RIGHT(
B9,4)[/TD]
[/TR]
</tbody>[/TABLE]
[/TD]
[/TR]
</tbody>[/TABLE]
[TABLE="width: 85%"]
<tbody>[TR]
[TD]
Array Formulas[TABLE="class: grid, width: 100%"]
<tbody>[TR]
[TH="width: 10"]Cell[/TH]
[TH="align: left"]Formula[/TH]
[/TR]
[TR]
[TH="width: 10"]C2[/TH]
[TD="align: left"]{=INDEX(
$B$8:$B$9,MATCH(B2,RIGHT($C$8:$C$9,4)+0,0))}[/TD]
[/TR]
[TR]
[TH="width: 10"]C3[/TH]
[TD="align: left"]{=INDEX(
$B$8:$B$9,MATCH(B3,RIGHT($C$8:$C$9,4)+0,0))}[/TD]
[/TR]
</tbody>[/TABLE]
Entered with Ctrl+Shift+Enter. If entered correctly, Excel will surround with curly braces {}.
Note: Do not try and enter the {} manually yourself[/TD]
[/TR]
</tbody>[/TABLE]