The given reaction involves the conversion of an optically pure trans-2-acetoxycyclohexyl tosylate to a product, let's determine what the major product [X] will be:

1. The reaction uses acetic acid (HOAc) and potassium acetate (KOAc) under heating (\Delta), which is a classic setup for an esterification or functional group transformation.
2. Since the starting material is optically pure and trans, the inversion of configuration can be expected in the mechanism, typically through an S_N2 reaction mechanism.
3. During S_N2 reaction, nucleophilic substitution will result in the inversion of the configuration at the carbon where the leaving group (tosylate) was attached.
4. However, since the product [X] is already in the trans configuration, the S_N2 reaction doesn't alter the relative stereochemistry of the two substituents on the cyclohexane ring.
5. Thus, the product will be racemic because the reaction produces a mixture of enantiomers resulting in no net optical activity due to their racemic nature.
6. Consequently, the major product [X] is racemic trans-1,2-cyclohexanediol diacetate.