Finding the Fourth Proportional to 88,128.54, 131,900.39 and 80,249.19

Step by Step Solution

1. Step 1: Write the proportion equation
   88,128.54 : 131,900.39 = 80,249.19 : x
2. Step 2: Convert to fraction form
   88,128.54/131,900.39 = 80,249.19/x
3. Step 3: Cross multiply
   88,128.54x = 131,900.39 × 80,249.19
4. Step 4: Simplify right side
   88,128.54x = 10,584,899,056.94
5. Step 5: Solve for x
   x = 10,584,899,056.94/88,128.54
6. Step 6: Final answer
   x = 120,107.50