I am doing a trial balance for July 31st, 2004...

One of my accounts is notes payable, due 2007: 28,450.

Do I divide this figure in four? In three? Report as total figure- 28,450?

The trial balance should be the exact balance you have in each account. All it's doing is checking that your total debits equal your total credits. Don't try to make anything fancy out of it.