Finding the Fourth Proportional to 361,359.90, 498,663.41 and 208,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,359.90 : 498,663.41 = 208,404.50 : x
2. Step 2: Convert to fraction form
   361,359.90/498,663.41 = 208,404.50/x
3. Step 3: Cross multiply
   361,359.90x = 498,663.41 × 208,404.50
4. Step 4: Simplify right side
   361,359.90x = 103,923,695,094.01
5. Step 5: Solve for x
   x = 103,923,695,094.01/361,359.90
6. Step 6: Final answer
   x = 287,590.56