Finding the Fourth Proportional to 88.87, 132.72 and 76.72

Step by Step Solution

1. Step 1: Write the proportion equation
   88.87 : 132.72 = 76.72 : x
2. Step 2: Convert to fraction form
   88.87/132.72 = 76.72/x
3. Step 3: Cross multiply
   88.87x = 132.72 × 76.72
4. Step 4: Simplify right side
   88.87x = 10,182.28
5. Step 5: Solve for x
   x = 10,182.28/88.87
6. Step 6: Final answer
   x = 114.57