Finding the Fourth Proportional to 404,234.10, 606,351.15 and 137,906.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,234.10 : 606,351.15 = 137,906.10 : x
2. Step 2: Convert to fraction form
   404,234.10/606,351.15 = 137,906.10/x
3. Step 3: Cross multiply
   404,234.10x = 606,351.15 × 137,906.10
4. Step 4: Simplify right side
   404,234.10x = 83,619,522,327.02
5. Step 5: Solve for x
   x = 83,619,522,327.02/404,234.10
6. Step 6: Final answer
   x = 206,859.15