Finding the Fourth Proportional to 88.29, 132.18 and 78.27

Step by Step Solution

1. Step 1: Write the proportion equation
   88.29 : 132.18 = 78.27 : x
2. Step 2: Convert to fraction form
   88.29/132.18 = 78.27/x
3. Step 3: Cross multiply
   88.29x = 132.18 × 78.27
4. Step 4: Simplify right side
   88.29x = 10,345.73
5. Step 5: Solve for x
   x = 10,345.73/88.29
6. Step 6: Final answer
   x = 117.18