Let:
- \( B \) be the length of the Beginners Trail.
- Then the length of the Medium Trail (\( M \)) can be expressed as \( M = 1.2B \).
- The length of the Advanced Trail (\( A \)) is given by \( A = 3.6M \).
Substituting \( M \) with \( 1.2B \) in the equation for \( A \):
\[ A = 3.6 \times (1.2B) \]
Calculating this:
\[ A = 3.6 \times 1.2 \times B = 4.32B \]
So, the Advanced Trail is \( 4.32 \) times as long as the Beginners Trail.