Finding the Fourth Proportional to 443,892.88, 612,399.72 and 282,718.96

Step by Step Solution

1. Step 1: Write the proportion equation
   443,892.88 : 612,399.72 = 282,718.96 : x
2. Step 2: Convert to fraction form
   443,892.88/612,399.72 = 282,718.96/x
3. Step 3: Cross multiply
   443,892.88x = 612,399.72 × 282,718.96
4. Step 4: Simplify right side
   443,892.88x = 173,137,011,942.69
5. Step 5: Solve for x
   x = 173,137,011,942.69/443,892.88
6. Step 6: Final answer
   x = 390,042.33