Finding the Fourth Proportional to 75.17, 103.72 and 42.42

Step by Step Solution

1. Step 1: Write the proportion equation
   75.17 : 103.72 = 42.42 : x
2. Step 2: Convert to fraction form
   75.17/103.72 = 42.42/x
3. Step 3: Cross multiply
   75.17x = 103.72 × 42.42
4. Step 4: Simplify right side
   75.17x = 4,399.28
5. Step 5: Solve for x
   x = 4,399.28/75.17
6. Step 6: Final answer
   x = 58.53