Finding the Fourth Proportional to 2,619.74, 3,615.25 and 1,440.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.74 : 3,615.25 = 1,440.81 : x
2. Step 2: Convert to fraction form
   2,619.74/3,615.25 = 1,440.81/x
3. Step 3: Cross multiply
   2,619.74x = 3,615.25 × 1,440.81
4. Step 4: Simplify right side
   2,619.74x = 5,208,881.15
5. Step 5: Solve for x
   x = 5,208,881.15/2,619.74
6. Step 6: Final answer
   x = 1,988.32