Finding the Fourth Proportional to 131,766.09, 197,401.14 and 65,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   131,766.09 : 197,401.14 = 65,128.20 : x
2. Step 2: Convert to fraction form
   131,766.09/197,401.14 = 65,128.20/x
3. Step 3: Cross multiply
   131,766.09x = 197,401.14 × 65,128.20
4. Step 4: Simplify right side
   131,766.09x = 12,856,380,926.15
5. Step 5: Solve for x
   x = 12,856,380,926.15/131,766.09
6. Step 6: Final answer
   x = 97,569.72