property for sale,five owners,four agree on price to ask, one does not, and is holding up sale

You can't, but you can file a partition suit and ask the Court to approve of and accept a private offer for the property as a means of partition. You'll need a real estate lawyer to do this. Perhaps a threat to the stubborn one to do this might move the matter as everyone will then spend money on lawyers if you go the partition route. Good luck.