Finding the Fourth Proportional to 131,659.20, 197,359.20 and 65,109.60

Step by Step Solution

1. Step 1: Write the proportion equation
   131,659.20 : 197,359.20 = 65,109.60 : x
2. Step 2: Convert to fraction form
   131,659.20/197,359.20 = 65,109.60/x
3. Step 3: Cross multiply
   131,659.20x = 197,359.20 × 65,109.60
4. Step 4: Simplify right side
   131,659.20x = 12,849,978,568.32
5. Step 5: Solve for x
   x = 12,849,978,568.32/131,659.20
6. Step 6: Final answer
   x = 97,600.31