Finding the Fourth Proportional to 2,399.60, 3,311.39 and 1,337.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.60 : 3,311.39 = 1,337.36 : x
2. Step 2: Convert to fraction form
   2,399.60/3,311.39 = 1,337.36/x
3. Step 3: Cross multiply
   2,399.60x = 3,311.39 × 1,337.36
4. Step 4: Simplify right side
   2,399.60x = 4,428,520.53
5. Step 5: Solve for x
   x = 4,428,520.53/2,399.60
6. Step 6: Final answer
   x = 1,845.52