Finding the Fourth Proportional to 361,648.63, 499,074.27 and 200,499.55

Step by Step Solution

1. Step 1: Write the proportion equation
   361,648.63 : 499,074.27 = 200,499.55 : x
2. Step 2: Convert to fraction form
   361,648.63/499,074.27 = 200,499.55/x
3. Step 3: Cross multiply
   361,648.63x = 499,074.27 × 200,499.55
4. Step 4: Simplify right side
   361,648.63x = 100,064,166,551.58
5. Step 5: Solve for x
   x = 100,064,166,551.58/361,648.63
6. Step 6: Final answer
   x = 276,688.91