Finding the Fourth Proportional to 2,619.56, 3,615.10 and 1,440.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.56 : 3,615.10 = 1,440.61 : x
2. Step 2: Convert to fraction form
   2,619.56/3,615.10 = 1,440.61/x
3. Step 3: Cross multiply
   2,619.56x = 3,615.10 × 1,440.61
4. Step 4: Simplify right side
   2,619.56x = 5,207,936.57
5. Step 5: Solve for x
   x = 5,207,936.57/2,619.56
6. Step 6: Final answer
   x = 1,988.09