Finding the Fourth Proportional to 2,619.50, 3,614.91 and 1,440.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.50 : 3,614.91 = 1,440.57 : x
2. Step 2: Convert to fraction form
   2,619.50/3,614.91 = 1,440.57/x
3. Step 3: Cross multiply
   2,619.50x = 3,614.91 × 1,440.57
4. Step 4: Simplify right side
   2,619.50x = 5,207,530.90
5. Step 5: Solve for x
   x = 5,207,530.90/2,619.50
6. Step 6: Final answer
   x = 1,987.99