If the client were on sheet2 try:

=LOOKUP(9E+99,Sheet2!F:F)

If you already have a list of sheet names from the hyperlinks in column
A you could fill down:

="=LOOKUP(9E+99,'"&A:A&"'!F:F)"

Then select the column copy and paste values and choose Text to Columns
Finish to evaluate.

wrote:

I am creating a Accounts Receivable workbook. I have a worksheet for
each client. On the first sheet of the workbook, I have created a
hyperlink to each client's records. I want to list the balance on the
main sheet as well. This requires the last cell with a value in the
Column (F, in this case) to be displayed, because each client has a
running total. Please help me with the formula to achieve these
results. Thank you in advance for any assistance.