Finding the Fourth Proportional to 141.72, 212.52 and 50.42

Step by Step Solution

1. Step 1: Write the proportion equation
   141.72 : 212.52 = 50.42 : x
2. Step 2: Convert to fraction form
   141.72/212.52 = 50.42/x
3. Step 3: Cross multiply
   141.72x = 212.52 × 50.42
4. Step 4: Simplify right side
   141.72x = 10,715.26
5. Step 5: Solve for x
   x = 10,715.26/141.72
6. Step 6: Final answer
   x = 75.61