Finding the Fourth Proportional to 2,619.17, 3,614.48 and 1,440.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.17 : 3,614.48 = 1,440.25 : x
2. Step 2: Convert to fraction form
   2,619.17/3,614.48 = 1,440.25/x
3. Step 3: Cross multiply
   2,619.17x = 3,614.48 × 1,440.25
4. Step 4: Simplify right side
   2,619.17x = 5,205,758.42
5. Step 5: Solve for x
   x = 5,205,758.42/2,619.17
6. Step 6: Final answer
   x = 1,987.56