Finding the Fourth Proportional to 402,417.78, 603,626.79 and 149,665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   402,417.78 : 603,626.79 = 149,665.25 : x
2. Step 2: Convert to fraction form
   402,417.78/603,626.79 = 149,665.25/x
3. Step 3: Cross multiply
   402,417.78x = 603,626.79 × 149,665.25
4. Step 4: Simplify right side
   402,417.78x = 90,341,951,413.91
5. Step 5: Solve for x
   x = 90,341,951,413.91/402,417.78
6. Step 6: Final answer
   x = 224,497.91