Finding the Fourth Proportional to 2,399.49, 3,312.20 and 1,404.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.49 : 3,312.20 = 1,404.77 : x
2. Step 2: Convert to fraction form
   2,399.49/3,312.20 = 1,404.77/x
3. Step 3: Cross multiply
   2,399.49x = 3,312.20 × 1,404.77
4. Step 4: Simplify right side
   2,399.49x = 4,652,866.14
5. Step 5: Solve for x
   x = 4,652,866.14/2,399.49
6. Step 6: Final answer
   x = 1,939.11