There are a couple of ways of doing this, depending on how elegant (expensive) you want the solution to be, whether you pay your credit card bill in full each month, how strong your accounting background is, and which modules you are using in Adagio (specifically whether you are using PurchaseOrders).

If you send me an email - steve@sschwartzcpa.com - I will send you a document I have prepared that lays out a basic solution.

Steve