Finding the Fourth Proportional to 2,559.78, 3,532.84 and 1,440.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.78 : 3,532.84 = 1,440.94 : x
2. Step 2: Convert to fraction form
   2,559.78/3,532.84 = 1,440.94/x
3. Step 3: Cross multiply
   2,559.78x = 3,532.84 × 1,440.94
4. Step 4: Simplify right side
   2,559.78x = 5,090,598.04
5. Step 5: Solve for x
   x = 5,090,598.04/2,559.78
6. Step 6: Final answer
   x = 1,988.69