Finding the Fourth Proportional to 2,619.15, 3,614.34 and 1,440.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.15 : 3,614.34 = 1,440.21 : x
2. Step 2: Convert to fraction form
   2,619.15/3,614.34 = 1,440.21/x
3. Step 3: Cross multiply
   2,619.15x = 3,614.34 × 1,440.21
4. Step 4: Simplify right side
   2,619.15x = 5,205,419.46
5. Step 5: Solve for x
   x = 5,205,419.46/2,619.15
6. Step 6: Final answer
   x = 1,987.44