Finding the Fourth Proportional to 406,730.52, 561,321.72 and 225,499.29

Step by Step Solution

1. Step 1: Write the proportion equation
   406,730.52 : 561,321.72 = 225,499.29 : x
2. Step 2: Convert to fraction form
   406,730.52/561,321.72 = 225,499.29/x
3. Step 3: Cross multiply
   406,730.52x = 561,321.72 × 225,499.29
4. Step 4: Simplify right side
   406,730.52x = 126,577,649,321.58
5. Step 5: Solve for x
   x = 126,577,649,321.58/406,730.52
6. Step 6: Final answer
   x = 311,207.65