Finding the Fourth Proportional to 88,168.56, 132,729.50 and 80,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,168.56 : 132,729.50 = 80,321.50 : x
2. Step 2: Convert to fraction form
   88,168.56/132,729.50 = 80,321.50/x
3. Step 3: Cross multiply
   88,168.56x = 132,729.50 × 80,321.50
4. Step 4: Simplify right side
   88,168.56x = 10,661,032,534.25
5. Step 5: Solve for x
   x = 10,661,032,534.25/88,168.56
6. Step 6: Final answer
   x = 120,916.49