Finding the Fourth Proportional to 54.17, 74.72 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54.17 : 74.72 = 42.50 : x
2. Step 2: Convert to fraction form
   54.17/74.72 = 42.50/x
3. Step 3: Cross multiply
   54.17x = 74.72 × 42.50
4. Step 4: Simplify right side
   54.17x = 3,175.01
5. Step 5: Solve for x
   x = 3,175.01/54.17
6. Step 6: Final answer
   x = 58.62