Finding the Fourth Proportional to 88,140.72, 131,918.71 and 80,261.45

Step by Step Solution

1. Step 1: Write the proportion equation
   88,140.72 : 131,918.71 = 80,261.45 : x
2. Step 2: Convert to fraction form
   88,140.72/131,918.71 = 80,261.45/x
3. Step 3: Cross multiply
   88,140.72x = 131,918.71 × 80,261.45
4. Step 4: Simplify right side
   88,140.72x = 10,587,986,946.73
5. Step 5: Solve for x
   x = 10,587,986,946.73/88,140.72
6. Step 6: Final answer
   x = 120,125.94