Finding the Fourth Proportional to 2,619.89, 3,615.39 and 1,440.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.89 : 3,615.39 = 1,440.93 : x
2. Step 2: Convert to fraction form
   2,619.89/3,615.39 = 1,440.93/x
3. Step 3: Cross multiply
   2,619.89x = 3,615.39 × 1,440.93
4. Step 4: Simplify right side
   2,619.89x = 5,209,523.91
5. Step 5: Solve for x
   x = 5,209,523.91/2,619.89
6. Step 6: Final answer
   x = 1,988.46