Finding the Fourth Proportional to 3,723.69, 5,142.15 and 2,399.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,723.69 : 5,142.15 = 2,399.67 : x
2. Step 2: Convert to fraction form
   3,723.69/5,142.15 = 2,399.67/x
3. Step 3: Cross multiply
   3,723.69x = 5,142.15 × 2,399.67
4. Step 4: Simplify right side
   3,723.69x = 12,339,463.09
5. Step 5: Solve for x
   x = 12,339,463.09/3,723.69
6. Step 6: Final answer
   x = 3,313.77