Finding the Fourth Proportional to 260,800.72, 391,275.30 and 83,321.56

Step by Step Solution

1. Step 1: Write the proportion equation
   260,800.72 : 391,275.30 = 83,321.56 : x
2. Step 2: Convert to fraction form
   260,800.72/391,275.30 = 83,321.56/x
3. Step 3: Cross multiply
   260,800.72x = 391,275.30 × 83,321.56
4. Step 4: Simplify right side
   260,800.72x = 32,601,668,385.47
5. Step 5: Solve for x
   x = 32,601,668,385.47/260,800.72
6. Step 6: Final answer
   x = 125,006.05