Finding the Fourth Proportional to 3,725.85, 5,142.83 and 2,399.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.85 : 5,142.83 = 2,399.55 : x
2. Step 2: Convert to fraction form
   3,725.85/5,142.83 = 2,399.55/x
3. Step 3: Cross multiply
   3,725.85x = 5,142.83 × 2,399.55
4. Step 4: Simplify right side
   3,725.85x = 12,340,477.73
5. Step 5: Solve for x
   x = 12,340,477.73/3,725.85
6. Step 6: Final answer
   x = 3,312.12