Start with the hemiacetal (in this case a hemiketal), what is the general structure of a hemiketal? You should be able to work out how to get a hemiketal from a ketone and an alcohol once you know the general structure of hemiketal.
Acetal (Ketal in this case) formation should be straightforward once you've done the hemiketal.
Hint: think about the mechanism for putting an isopropylidine protecting on a 1,2-diol.