Finding the Fourth Proportional to 309,307.68, 426,874.56 and 173,364.72

Step by Step Solution

1. Step 1: Write the proportion equation
   309,307.68 : 426,874.56 = 173,364.72 : x
2. Step 2: Convert to fraction form
   309,307.68/426,874.56 = 173,364.72/x
3. Step 3: Cross multiply
   309,307.68x = 426,874.56 × 173,364.72
4. Step 4: Simplify right side
   309,307.68x = 74,004,988,569.52
5. Step 5: Solve for x
   x = 74,004,988,569.52/309,307.68
6. Step 6: Final answer
   x = 239,260.11