Finding the Fourth Proportional to 656,323.50, 905,726.79 and 354,517.50

Step by Step Solution

1. Step 1: Write the proportion equation
   656,323.50 : 905,726.79 = 354,517.50 : x
2. Step 2: Convert to fraction form
   656,323.50/905,726.79 = 354,517.50/x
3. Step 3: Cross multiply
   656,323.50x = 905,726.79 × 354,517.50
4. Step 4: Simplify right side
   656,323.50x = 321,095,997,273.83
5. Step 5: Solve for x
   x = 321,095,997,273.83/656,323.50
6. Step 6: Final answer
   x = 489,234.34