Finding the Fourth Proportional to 2,559.32, 3,531.57 and 1,440.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.32 : 3,531.57 = 1,440.23 : x
2. Step 2: Convert to fraction form
   2,559.32/3,531.57 = 1,440.23/x
3. Step 3: Cross multiply
   2,559.32x = 3,531.57 × 1,440.23
4. Step 4: Simplify right side
   2,559.32x = 5,086,250.00
5. Step 5: Solve for x
   x = 5,086,250.00/2,559.32
6. Step 6: Final answer
   x = 1,987.35