Finding the Fourth Proportional to 2,573.68, 3,860.64 and 724.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.68 : 3,860.64 = 724.72 : x
2. Step 2: Convert to fraction form
   2,573.68/3,860.64 = 724.72/x
3. Step 3: Cross multiply
   2,573.68x = 3,860.64 × 724.72
4. Step 4: Simplify right side
   2,573.68x = 2,797,883.02
5. Step 5: Solve for x
   x = 2,797,883.02/2,573.68
6. Step 6: Final answer
   x = 1,087.11