Finding the Fourth Proportional to 88.52, 132.74 and 42.88

Step by Step Solution

1. Step 1: Write the proportion equation
   88.52 : 132.74 = 42.88 : x
2. Step 2: Convert to fraction form
   88.52/132.74 = 42.88/x
3. Step 3: Cross multiply
   88.52x = 132.74 × 42.88
4. Step 4: Simplify right side
   88.52x = 5,691.01
5. Step 5: Solve for x
   x = 5,691.01/88.52
6. Step 6: Final answer
   x = 64.29