Finding the Fourth Proportional to 361,647.63, 499,072.89 and 200,498.55

Step by Step Solution

1. Step 1: Write the proportion equation
   361,647.63 : 499,072.89 = 200,498.55 : x
2. Step 2: Convert to fraction form
   361,647.63/499,072.89 = 200,498.55/x
3. Step 3: Cross multiply
   361,647.63x = 499,072.89 × 200,498.55
4. Step 4: Simplify right side
   361,647.63x = 100,063,390,789.31
5. Step 5: Solve for x
   x = 100,063,390,789.31/361,647.63
6. Step 6: Final answer
   x = 276,687.53