Finding the Fourth Proportional to 88.50, 132.54 and 42.74

Step by Step Solution

1. Step 1: Write the proportion equation
   88.50 : 132.54 = 42.74 : x
2. Step 2: Convert to fraction form
   88.50/132.54 = 42.74/x
3. Step 3: Cross multiply
   88.50x = 132.54 × 42.74
4. Step 4: Simplify right side
   88.50x = 5,663.88
5. Step 5: Solve for x
   x = 5,663.88/88.50
6. Step 6: Final answer
   x = 64.00