Finding the Fourth Proportional to 2,399.57, 3,311.37 and 1,351.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.57 : 3,311.37 = 1,351.63 : x
2. Step 2: Convert to fraction form
   2,399.57/3,311.37 = 1,351.63/x
3. Step 3: Cross multiply
   2,399.57x = 3,311.37 × 1,351.63
4. Step 4: Simplify right side
   2,399.57x = 4,475,747.03
5. Step 5: Solve for x
   x = 4,475,747.03/2,399.57
6. Step 6: Final answer
   x = 1,865.23