Finding the Fourth Proportional to 75.18, 103.71 and 42.42

Step by Step Solution

1. Step 1: Write the proportion equation
   75.18 : 103.71 = 42.42 : x
2. Step 2: Convert to fraction form
   75.18/103.71 = 42.42/x
3. Step 3: Cross multiply
   75.18x = 103.71 × 42.42
4. Step 4: Simplify right side
   75.18x = 4,399.38
5. Step 5: Solve for x
   x = 4,399.38/75.18
6. Step 6: Final answer
   x = 58.52