Finding the Fourth Proportional to 309,158.20, 426,665.38 and 173,189.98

Step by Step Solution

1. Step 1: Write the proportion equation
   309,158.20 : 426,665.38 = 173,189.98 : x
2. Step 2: Convert to fraction form
   309,158.20/426,665.38 = 173,189.98/x
3. Step 3: Cross multiply
   309,158.20x = 426,665.38 × 173,189.98
4. Step 4: Simplify right side
   309,158.20x = 73,894,168,628.89
5. Step 5: Solve for x
   x = 73,894,168,628.89/309,158.20
6. Step 6: Final answer
   x = 239,017.33