Finding the Fourth Proportional to 2,561.96, 3,535.68 and 1,443

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.96 : 3,535.68 = 1,443 : x
2. Step 2: Convert to fraction form
   2,561.96/3,535.68 = 1,443/x
3. Step 3: Cross multiply
   2,561.96x = 3,535.68 × 1,443
4. Step 4: Simplify right side
   2,561.96x = 5,101,986.24
5. Step 5: Solve for x
   x = 5,101,986.24/2,561.96
6. Step 6: Final answer
   x = 1,991.44