Finding the Fourth Proportional to 309,165.01, 426,643.76 and 173,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   309,165.01 : 426,643.76 = 173,196.50 : x
2. Step 2: Convert to fraction form
   309,165.01/426,643.76 = 173,196.50/x
3. Step 3: Cross multiply
   309,165.01x = 426,643.76 × 173,196.50
4. Step 4: Simplify right side
   309,165.01x = 73,893,204,278.61
5. Step 5: Solve for x
   x = 73,893,204,278.61/309,165.01
6. Step 6: Final answer
   x = 239,008.95