Finding the Fourth Proportional to 2,115.88, 3,168.13 and 1,724.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.88 : 3,168.13 = 1,724.27 : x
2. Step 2: Convert to fraction form
   2,115.88/3,168.13 = 1,724.27/x
3. Step 3: Cross multiply
   2,115.88x = 3,168.13 × 1,724.27
4. Step 4: Simplify right side
   2,115.88x = 5,462,711.52
5. Step 5: Solve for x
   x = 5,462,711.52/2,115.88
6. Step 6: Final answer
   x = 2,581.77