=VLOOKUP(A7,Table,MATCH(D1,INDEX(Table,1,0),0),0)

where Table is assumed to include the topmost row. The match-type
(range_lookup) is set 0 (FALSE) in order to effect exact matching of the
lookup values.

Amy wrote:
I have a large spreadsheet that currently uses the VLOOKUP function. I want
to add more data to my "Cheat Sheet" so that I can have a VLOOKUP pull up the
value on the vertical access then cross reference to an HLOOKUP that looks up
the value on the horizontal access, and the result returns the value where
both criteria are met in the middle.

For example, if the lookup value for the VLOOKUP is in cell A7 (along the
vertical axis/left most column) on the original table array, and the lookup
value for the HLOOKUP is in cell D1 (along the horizontal axis/top most row),
I want the value returned to be the value that is in D7 (where the two cell
values meet on the grid).