Finding the Fourth Proportional to 309,047.12, 426,470.28 and 189,792.08

Step by Step Solution

1. Step 1: Write the proportion equation
   309,047.12 : 426,470.28 = 189,792.08 : x
2. Step 2: Convert to fraction form
   309,047.12/426,470.28 = 189,792.08/x
3. Step 3: Cross multiply
   309,047.12x = 426,470.28 × 189,792.08
4. Step 4: Simplify right side
   309,047.12x = 80,940,681,499.38
5. Step 5: Solve for x
   x = 80,940,681,499.38/309,047.12
6. Step 6: Final answer
   x = 261,904.01