Finding the Fourth Proportional to 1,724.04, 2,569.50 and 1,721.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.04 : 2,569.50 = 1,721.31 : x
2. Step 2: Convert to fraction form
   1,724.04/2,569.50 = 1,721.31/x
3. Step 3: Cross multiply
   1,724.04x = 2,569.50 × 1,721.31
4. Step 4: Simplify right side
   1,724.04x = 4,422,906.05
5. Step 5: Solve for x
   x = 4,422,906.05/1,724.04
6. Step 6: Final answer
   x = 2,565.43