Finding the Fourth Proportional to 361,528.56, 498,909.42 and 200,407.86

Step by Step Solution

1. Step 1: Write the proportion equation
   361,528.56 : 498,909.42 = 200,407.86 : x
2. Step 2: Convert to fraction form
   361,528.56/498,909.42 = 200,407.86/x
3. Step 3: Cross multiply
   361,528.56x = 498,909.42 × 200,407.86
4. Step 4: Simplify right side
   361,528.56x = 99,985,369,196.04
5. Step 5: Solve for x
   x = 99,985,369,196.04/361,528.56
6. Step 6: Final answer
   x = 276,562.85