Finding the Fourth Proportional to 2,617.57, 3,923.92 and 2,126.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.57 : 3,923.92 = 2,126.71 : x
2. Step 2: Convert to fraction form
   2,617.57/3,923.92 = 2,126.71/x
3. Step 3: Cross multiply
   2,617.57x = 3,923.92 × 2,126.71
4. Step 4: Simplify right side
   2,617.57x = 8,345,039.90
5. Step 5: Solve for x
   x = 8,345,039.90/2,617.57
6. Step 6: Final answer
   x = 3,188.09