Finding the Fourth Proportional to 2,399.36, 3,311.42 and 1,404.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.36 : 3,311.42 = 1,404.45 : x
2. Step 2: Convert to fraction form
   2,399.36/3,311.42 = 1,404.45/x
3. Step 3: Cross multiply
   2,399.36x = 3,311.42 × 1,404.45
4. Step 4: Simplify right side
   2,399.36x = 4,650,716.80
5. Step 5: Solve for x
   x = 4,650,716.80/2,399.36
6. Step 6: Final answer
   x = 1,938.32