Finding the Fourth Proportional to 309,401.81, 426,892.16 and 178,546.31

Step by Step Solution

1. Step 1: Write the proportion equation
   309,401.81 : 426,892.16 = 178,546.31 : x
2. Step 2: Convert to fraction form
   309,401.81/426,892.16 = 178,546.31/x
3. Step 3: Cross multiply
   309,401.81x = 426,892.16 × 178,546.31
4. Step 4: Simplify right side
   309,401.81x = 76,220,019,935.93
5. Step 5: Solve for x
   x = 76,220,019,935.93/309,401.81
6. Step 6: Final answer
   x = 246,346.39