Finding the Fourth Proportional to 359,861.50, 496,652.61 and 208,958.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,861.50 : 496,652.61 = 208,958.50 : x
2. Step 2: Convert to fraction form
   359,861.50/496,652.61 = 208,958.50/x
3. Step 3: Cross multiply
   359,861.50x = 496,652.61 × 208,958.50
4. Step 4: Simplify right side
   359,861.50x = 103,779,784,406.69
5. Step 5: Solve for x
   x = 103,779,784,406.69/359,861.50
6. Step 6: Final answer
   x = 288,388.13