Finding the Fourth Proportional to 2,619.50, 3,615 and 1,440.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.50 : 3,615 = 1,440.62 : x
2. Step 2: Convert to fraction form
   2,619.50/3,615 = 1,440.62/x
3. Step 3: Cross multiply
   2,619.50x = 3,615 × 1,440.62
4. Step 4: Simplify right side
   2,619.50x = 5,207,841.30
5. Step 5: Solve for x
   x = 5,207,841.30/2,619.50
6. Step 6: Final answer
   x = 1,988.11