Finding the Fourth Proportional to 402,411.78, 603,617.78 and 149,659.25

Step by Step Solution

1. Step 1: Write the proportion equation
   402,411.78 : 603,617.78 = 149,659.25 : x
2. Step 2: Convert to fraction form
   402,411.78/603,617.78 = 149,659.25/x
3. Step 3: Cross multiply
   402,411.78x = 603,617.78 × 149,659.25
4. Step 4: Simplify right side
   402,411.78x = 90,336,981,597.52
5. Step 5: Solve for x
   x = 90,336,981,597.52/402,411.78
6. Step 6: Final answer
   x = 224,488.91