Finding the Fourth Proportional to 3,725.88, 5,140.71 and 2,399.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.88 : 5,140.71 = 2,399.10 : x
2. Step 2: Convert to fraction form
   3,725.88/5,140.71 = 2,399.10/x
3. Step 3: Cross multiply
   3,725.88x = 5,140.71 × 2,399.10
4. Step 4: Simplify right side
   3,725.88x = 12,333,077.36
5. Step 5: Solve for x
   x = 12,333,077.36/3,725.88
6. Step 6: Final answer
   x = 3,310.11