Finding the Fourth Proportional to 321,485.88, 482,117.96 and 131,892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   321,485.88 : 482,117.96 = 131,892.72 : x
2. Step 2: Convert to fraction form
   321,485.88/482,117.96 = 131,892.72/x
3. Step 3: Cross multiply
   321,485.88x = 482,117.96 × 131,892.72
4. Step 4: Simplify right side
   321,485.88x = 63,587,849,105.25
5. Step 5: Solve for x
   x = 63,587,849,105.25/321,485.88
6. Step 6: Final answer
   x = 197,793.60