Finding the Fourth Proportional to 2,698.72, 4,048.14 and 1,399.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,698.72 : 4,048.14 = 1,399.48 : x
2. Step 2: Convert to fraction form
   2,698.72/4,048.14 = 1,399.48/x
3. Step 3: Cross multiply
   2,698.72x = 4,048.14 × 1,399.48
4. Step 4: Simplify right side
   2,698.72x = 5,665,290.97
5. Step 5: Solve for x
   x = 5,665,290.97/2,698.72
6. Step 6: Final answer
   x = 2,099.25