Finding the Fourth Proportional to 359,793.50, 496,558.78 and 208,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,793.50 : 496,558.78 = 208,890.50 : x
2. Step 2: Convert to fraction form
   359,793.50/496,558.78 = 208,890.50/x
3. Step 3: Cross multiply
   359,793.50x = 496,558.78 × 208,890.50
4. Step 4: Simplify right side
   359,793.50x = 103,726,411,833.59
5. Step 5: Solve for x
   x = 103,726,411,833.59/359,793.50
6. Step 6: Final answer
   x = 288,294.29