Missing Sequence Terms Practice Test

The sequence $$2, 6, 18, 54, \ldots$$ follows a geometric pattern. If three terms are removed from this sequence such that the resulting sequence is $$2, _, 1458$$, what is the missing term?

A sequence follows the pattern where each term is the sum of the two preceding terms, similar to the Fibonacci sequence. If the first term is $$x$$, the second term is $$x + 3$$, and the fifth term is $$34$$, what is the value of the third term?