Finding the Fourth Proportional to 88.57, 132.76 and 42.82

Step by Step Solution

1. Step 1: Write the proportion equation
   88.57 : 132.76 = 42.82 : x
2. Step 2: Convert to fraction form
   88.57/132.76 = 42.82/x
3. Step 3: Cross multiply
   88.57x = 132.76 × 42.82
4. Step 4: Simplify right side
   88.57x = 5,683.91
5. Step 5: Solve for x
   x = 5,683.91/88.57
6. Step 6: Final answer
   x = 64.17