I have 3 1099-misc forms from different companies on one royalty property can i combine all together or do I need to show as three different properties?

Technically, yes, but you probably should not.  When you enter the 1099 in TurboTax a worksheet is created for the 1099.  This worksheet is one of the few 1099 work sheets that say keep for your records.  However, for the accuracy guarantee and to be sure that there is nothing behind the scenes that should be transmitted that would not be transmitted it is best practices to always enter all of your forms as they appear in hand.