Finding the Fourth Proportional to 624,478.56, 861,786.72 and 338,004.78

Step by Step Solution

1. Step 1: Write the proportion equation
   624,478.56 : 861,786.72 = 338,004.78 : x
2. Step 2: Convert to fraction form
   624,478.56/861,786.72 = 338,004.78/x
3. Step 3: Cross multiply
   624,478.56x = 861,786.72 × 338,004.78
4. Step 4: Simplify right side
   624,478.56x = 291,288,030,700.52
5. Step 5: Solve for x
   x = 291,288,030,700.52/624,478.56
6. Step 6: Final answer
   x = 466,450.01