Finding the Fourth Proportional to 2,399.63, 3,311.49 and 1,351.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.63 : 3,311.49 = 1,351.71 : x
2. Step 2: Convert to fraction form
   2,399.63/3,311.49 = 1,351.71/x
3. Step 3: Cross multiply
   2,399.63x = 3,311.49 × 1,351.71
4. Step 4: Simplify right side
   2,399.63x = 4,476,174.15
5. Step 5: Solve for x
   x = 4,476,174.15/2,399.63
6. Step 6: Final answer
   x = 1,865.36