Finding the Fourth Proportional to 2,573.25, 3,859.29 and 724.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.25 : 3,859.29 = 724.55 : x
2. Step 2: Convert to fraction form
   2,573.25/3,859.29 = 724.55/x
3. Step 3: Cross multiply
   2,573.25x = 3,859.29 × 724.55
4. Step 4: Simplify right side
   2,573.25x = 2,796,229.27
5. Step 5: Solve for x
   x = 2,796,229.27/2,573.25
6. Step 6: Final answer
   x = 1,086.65