Finding the Fourth Proportional to 88.50, 132.57 and 42.71

Step by Step Solution

1. Step 1: Write the proportion equation
   88.50 : 132.57 = 42.71 : x
2. Step 2: Convert to fraction form
   88.50/132.57 = 42.71/x
3. Step 3: Cross multiply
   88.50x = 132.57 × 42.71
4. Step 4: Simplify right side
   88.50x = 5,662.15
5. Step 5: Solve for x
   x = 5,662.15/88.50
6. Step 6: Final answer
   x = 63.98