Finding the Fourth Proportional to 2,561.43, 3,534.78 and 1,442.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.43 : 3,534.78 = 1,442.39 : x
2. Step 2: Convert to fraction form
   2,561.43/3,534.78 = 1,442.39/x
3. Step 3: Cross multiply
   2,561.43x = 3,534.78 × 1,442.39
4. Step 4: Simplify right side
   2,561.43x = 5,098,513.65
5. Step 5: Solve for x
   x = 5,098,513.65/2,561.43
6. Step 6: Final answer
   x = 1,990.50