Finding the Fourth Proportional to 88.55, 132.86 and 42.88

Step by Step Solution

1. Step 1: Write the proportion equation
   88.55 : 132.86 = 42.88 : x
2. Step 2: Convert to fraction form
   88.55/132.86 = 42.88/x
3. Step 3: Cross multiply
   88.55x = 132.86 × 42.88
4. Step 4: Simplify right side
   88.55x = 5,697.04
5. Step 5: Solve for x
   x = 5,697.04/88.55
6. Step 6: Final answer
   x = 64.34