Finding the Fourth Proportional to 2,578.24, 3,557.94 and 1,443.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.24 : 3,557.94 = 1,443.89 : x
2. Step 2: Convert to fraction form
   2,578.24/3,557.94 = 1,443.89/x
3. Step 3: Cross multiply
   2,578.24x = 3,557.94 × 1,443.89
4. Step 4: Simplify right side
   2,578.24x = 5,137,273.99
5. Step 5: Solve for x
   x = 5,137,273.99/2,578.24
6. Step 6: Final answer
   x = 1,992.55