Finding the Fourth Proportional to 2,561.79, 3,535.25 and 1,442.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.79 : 3,535.25 = 1,442.78 : x
2. Step 2: Convert to fraction form
   2,561.79/3,535.25 = 1,442.78/x
3. Step 3: Cross multiply
   2,561.79x = 3,535.25 × 1,442.78
4. Step 4: Simplify right side
   2,561.79x = 5,100,588.00
5. Step 5: Solve for x
   x = 5,100,588.00/2,561.79
6. Step 6: Final answer
   x = 1,991.03