Finding the Fourth Proportional to 2,578.07, 3,557.71 and 1,443.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.07 : 3,557.71 = 1,443.73 : x
2. Step 2: Convert to fraction form
   2,578.07/3,557.71 = 1,443.73/x
3. Step 3: Cross multiply
   2,578.07x = 3,557.71 × 1,443.73
4. Step 4: Simplify right side
   2,578.07x = 5,136,372.66
5. Step 5: Solve for x
   x = 5,136,372.66/2,578.07
6. Step 6: Final answer
   x = 1,992.33