Finding the Fourth Proportional to 309,494.34, 424,320.71 and 303,895.62

Step by Step Solution

1. Step 1: Write the proportion equation
   309,494.34 : 424,320.71 = 303,895.62 : x
2. Step 2: Convert to fraction form
   309,494.34/424,320.71 = 303,895.62/x
3. Step 3: Cross multiply
   309,494.34x = 424,320.71 × 303,895.62
4. Step 4: Simplify right side
   309,494.34x = 128,949,203,724.81
5. Step 5: Solve for x
   x = 128,949,203,724.81/309,494.34
6. Step 6: Final answer
   x = 416,644.79