Finding the Fourth Proportional to 2,399.64, 3,311.06 and 1,404.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.64 : 3,311.06 = 1,404.96 : x
2. Step 2: Convert to fraction form
   2,399.64/3,311.06 = 1,404.96/x
3. Step 3: Cross multiply
   2,399.64x = 3,311.06 × 1,404.96
4. Step 4: Simplify right side
   2,399.64x = 4,651,899.83
5. Step 5: Solve for x
   x = 4,651,899.83/2,399.64
6. Step 6: Final answer
   x = 1,938.58