Finding the Fourth Proportional to 309,178.47, 426,569.43 and 173,194.05

Step by Step Solution

1. Step 1: Write the proportion equation
   309,178.47 : 426,569.43 = 173,194.05 : x
2. Step 2: Convert to fraction form
   309,178.47/426,569.43 = 173,194.05/x
3. Step 3: Cross multiply
   309,178.47x = 426,569.43 × 173,194.05
4. Step 4: Simplify right side
   309,178.47x = 73,879,287,187.89
5. Step 5: Solve for x
   x = 73,879,287,187.89/309,178.47
6. Step 6: Final answer
   x = 238,953.53