Finding the Fourth Proportional to 2,559.30, 3,531.56 and 1,440.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.30 : 3,531.56 = 1,440.14 : x
2. Step 2: Convert to fraction form
   2,559.30/3,531.56 = 1,440.14/x
3. Step 3: Cross multiply
   2,559.30x = 3,531.56 × 1,440.14
4. Step 4: Simplify right side
   2,559.30x = 5,085,940.82
5. Step 5: Solve for x
   x = 5,085,940.82/2,559.30
6. Step 6: Final answer
   x = 1,987.24