Finding the Fourth Proportional to 406,621.72, 561,150.27 and 225,316.69

Step by Step Solution

1. Step 1: Write the proportion equation
   406,621.72 : 561,150.27 = 225,316.69 : x
2. Step 2: Convert to fraction form
   406,621.72/561,150.27 = 225,316.69/x
3. Step 3: Cross multiply
   406,621.72x = 561,150.27 × 225,316.69
4. Step 4: Simplify right side
   406,621.72x = 126,436,521,429.01
5. Step 5: Solve for x
   x = 126,436,521,429.01/406,621.72
6. Step 6: Final answer
   x = 310,943.85