Is this synthetic Royco 782 compatible with the mineral Royco 756 that we used to use in our RVs?

Royco 782 is a MIL-PRF-83282 hydrolic fluid and should not be mixed with oils other than MIL-PRF-83282 and revisions there to. Royco 756 is MIL-PRF-5606 and would not be compatable with 782.