Finding the Fourth Proportional to 3,963.84, 5,469.48 and 2,285.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,963.84 : 5,469.48 = 2,285.31 : x
2. Step 2: Convert to fraction form
   3,963.84/5,469.48 = 2,285.31/x
3. Step 3: Cross multiply
   3,963.84x = 5,469.48 × 2,285.31
4. Step 4: Simplify right side
   3,963.84x = 12,499,457.34
5. Step 5: Solve for x
   x = 12,499,457.34/3,963.84
6. Step 6: Final answer
   x = 3,153.37