Finding the Fourth Proportional to 3,962.79, 5,469.86 and 2,285.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,962.79 : 5,469.86 = 2,285.31 : x
2. Step 2: Convert to fraction form
   3,962.79/5,469.86 = 2,285.31/x
3. Step 3: Cross multiply
   3,962.79x = 5,469.86 × 2,285.31
4. Step 4: Simplify right side
   3,962.79x = 12,500,351.98
5. Step 5: Solve for x
   x = 12,500,351.98/3,962.79
6. Step 6: Final answer
   x = 3,154.43