Finding the Fourth Proportional to 2,559.72, 3,532.38 and 1,440.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.72 : 3,532.38 = 1,440.67 : x
2. Step 2: Convert to fraction form
   2,559.72/3,532.38 = 1,440.67/x
3. Step 3: Cross multiply
   2,559.72x = 3,532.38 × 1,440.67
4. Step 4: Simplify right side
   2,559.72x = 5,088,986.28
5. Step 5: Solve for x
   x = 5,088,986.28/2,559.72
6. Step 6: Final answer
   x = 1,988.10