Finding the Fourth Proportional to 88,128.43, 132,032.26 and 78,680.59

Step by Step Solution

1. Step 1: Write the proportion equation
   88,128.43 : 132,032.26 = 78,680.59 : x
2. Step 2: Convert to fraction form
   88,128.43/132,032.26 = 78,680.59/x
3. Step 3: Cross multiply
   88,128.43x = 132,032.26 × 78,680.59
4. Step 4: Simplify right side
   88,128.43x = 10,388,375,062.27
5. Step 5: Solve for x
   x = 10,388,375,062.27/88,128.43
6. Step 6: Final answer
   x = 117,877.69