Finding the Fourth Proportional to 88.35, 132.50 and 42.61

Step by Step Solution

1. Step 1: Write the proportion equation
   88.35 : 132.50 = 42.61 : x
2. Step 2: Convert to fraction form
   88.35/132.50 = 42.61/x
3. Step 3: Cross multiply
   88.35x = 132.50 × 42.61
4. Step 4: Simplify right side
   88.35x = 5,645.83
5. Step 5: Solve for x
   x = 5,645.83/88.35
6. Step 6: Final answer
   x = 63.90