"michael is the fastest swimmer," is a proposition of

The answer is: preposition of fact

Preposition of fact refers to preposition that being done in order to state a certain information objectively without influenced by opinion. Currently, the fastest swimming record ever recorded is held by Micheal Phelps, an american professional swimmer who had won  23 gold medals and 28 overall throughout his career.

answer; ///approx///5,000 miles;