Yep. He did it. Where the money came from to pay the bonding company fees, and how Trump convinced a bonding company to accept him as a credit risk, is anyone's guess. We may learn more later, but I don't think Trump is required to disclose his funding sources in this instance.
The EXCELLENT news for E. Jean Carroll is $91.6 million is GUARANTEED to be paid to Carroll once Trump's appeals are exhausted. Now that the bond is posted, Trump has no control over the disposition of this money, the court does. This will take some time for the appeal to work their way through the higher courts, but the money is Carroll's, if she prevails on appeal ... which is highly likely, as we will find out as the appeals play out.
When Trump fails on appeal, the bonding company (Chubb), will be obligated to pay Carroll the 91.6 million, and Trump will be powerless to stop that. Also at that point, Trump will be obligated to pay back Chub the $91.6 million they covered. In this action, Trump delayed the inevitable, but he will one day pay.