Finding the Fourth Proportional to 406,685.52, 561,091.59 and 245,479.32

Step by Step Solution

1. Step 1: Write the proportion equation
   406,685.52 : 561,091.59 = 245,479.32 : x
2. Step 2: Convert to fraction form
   406,685.52/561,091.59 = 245,479.32/x
3. Step 3: Cross multiply
   406,685.52x = 561,091.59 × 245,479.32
4. Step 4: Simplify right side
   406,685.52x = 137,736,381,970.92
5. Step 5: Solve for x
   x = 137,736,381,970.92/406,685.52
6. Step 6: Final answer
   x = 338,680.32