Finding the Fourth Proportional to 88.63, 132.81 and 42.96

Step by Step Solution

1. Step 1: Write the proportion equation
   88.63 : 132.81 = 42.96 : x
2. Step 2: Convert to fraction form
   88.63/132.81 = 42.96/x
3. Step 3: Cross multiply
   88.63x = 132.81 × 42.96
4. Step 4: Simplify right side
   88.63x = 5,705.52
5. Step 5: Solve for x
   x = 5,705.52/88.63
6. Step 6: Final answer
   x = 64.37