Finding the Fourth Proportional to 2,111.24, 3,165.94 and 724.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.24 : 3,165.94 = 724.71 : x
2. Step 2: Convert to fraction form
   2,111.24/3,165.94 = 724.71/x
3. Step 3: Cross multiply
   2,111.24x = 3,165.94 × 724.71
4. Step 4: Simplify right side
   2,111.24x = 2,294,377.41
5. Step 5: Solve for x
   x = 2,294,377.41/2,111.24
6. Step 6: Final answer
   x = 1,086.75