Finding the Fourth Proportional to 309,411.72, 426,836.28 and 201,932.04

Step by Step Solution

1. Step 1: Write the proportion equation
   309,411.72 : 426,836.28 = 201,932.04 : x
2. Step 2: Convert to fraction form
   309,411.72/426,836.28 = 201,932.04/x
3. Step 3: Cross multiply
   309,411.72x = 426,836.28 × 201,932.04
4. Step 4: Simplify right side
   309,411.72x = 86,191,920,766.41
5. Step 5: Solve for x
   x = 86,191,920,766.41/309,411.72
6. Step 6: Final answer
   x = 278,567.08