Finding the Fourth Proportional to 406,641.35, 561,139.56 and 225,342.69

Step by Step Solution

1. Step 1: Write the proportion equation
   406,641.35 : 561,139.56 = 225,342.69 : x
2. Step 2: Convert to fraction form
   406,641.35/561,139.56 = 225,342.69/x
3. Step 3: Cross multiply
   406,641.35x = 561,139.56 × 225,342.69
4. Step 4: Simplify right side
   406,641.35x = 126,448,697,915.82
5. Step 5: Solve for x
   x = 126,448,697,915.82/406,641.35
6. Step 6: Final answer
   x = 310,958.78