Finding the Fourth Proportional to 309,399.27, 426,990.72 and 173,433.27

Step by Step Solution

1. Step 1: Write the proportion equation
   309,399.27 : 426,990.72 = 173,433.27 : x
2. Step 2: Convert to fraction form
   309,399.27/426,990.72 = 173,433.27/x
3. Step 3: Cross multiply
   309,399.27x = 426,990.72 × 173,433.27
4. Step 4: Simplify right side
   309,399.27x = 74,054,396,829.25
5. Step 5: Solve for x
   x = 74,054,396,829.25/309,399.27
6. Step 6: Final answer
   x = 239,348.97