How to find the cheque number the invoice was paid on without searching through the payments

Open Vendor (or Customer) Aged detail report by clicking Reports, Payables (or Receivables), Vendor Aged (or Customer Aged)
Select specific vendor (or customer)
Make sure the "Include invoices paid in the last ____ days" field has an appropriate number of days.
Select OK
When the report loads, Hit Ctrl + F to bring up the find menu at the bottom of the report
Key in the invoice number
All payments (with cheque numbers) for that invoice will be listed below