Finding the Fourth Proportional to 88.85, 132.59 and 78.82

Step by Step Solution

1. Step 1: Write the proportion equation
   88.85 : 132.59 = 78.82 : x
2. Step 2: Convert to fraction form
   88.85/132.59 = 78.82/x
3. Step 3: Cross multiply
   88.85x = 132.59 × 78.82
4. Step 4: Simplify right side
   88.85x = 10,450.91
5. Step 5: Solve for x
   x = 10,450.91/88.85
6. Step 6: Final answer
   x = 117.63