Finding the Third Proportional to 86,158.69 and 131,728.78

Step by Step Solution

1. Step 1: Write the proportion equation
   86,158.69 : 131,728.78 = 131,728.78 : x
2. Step 2: Convert to fraction form
   86,158.69/131,728.78 = 131,728.78/x
3. Step 3: Cross multiply
   86,158.69x = 131,728.78 × 131,728.78
4. Step 4: Simplify right side
   86,158.69x = 17,352,471,809.61
5. Step 5: Solve for x
   x = 17,352,471,809.61/86,158.69
6. Step 6: Final answer
   x = 201,401.30