Finding the Fourth Proportional to 2,579.89, 3,868.56 and 1,839.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.89 : 3,868.56 = 1,839.10 : x
2. Step 2: Convert to fraction form
   2,579.89/3,868.56 = 1,839.10/x
3. Step 3: Cross multiply
   2,579.89x = 3,868.56 × 1,839.10
4. Step 4: Simplify right side
   2,579.89x = 7,114,668.70
5. Step 5: Solve for x
   x = 7,114,668.70/2,579.89
6. Step 6: Final answer
   x = 2,757.74