Finding the Fourth Proportional to 3,456.27, 5,176.71 and 1,721.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.27 : 5,176.71 = 1,721.25 : x
2. Step 2: Convert to fraction form
   3,456.27/5,176.71 = 1,721.25/x
3. Step 3: Cross multiply
   3,456.27x = 5,176.71 × 1,721.25
4. Step 4: Simplify right side
   3,456.27x = 8,910,412.09
5. Step 5: Solve for x
   x = 8,910,412.09/3,456.27
6. Step 6: Final answer
   x = 2,578.04