Finding the Fourth Proportional to 2,111.68, 3,167.18 and 724.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.68 : 3,167.18 = 724.96 : x
2. Step 2: Convert to fraction form
   2,111.68/3,167.18 = 724.96/x
3. Step 3: Cross multiply
   2,111.68x = 3,167.18 × 724.96
4. Step 4: Simplify right side
   2,111.68x = 2,296,078.81
5. Step 5: Solve for x
   x = 2,296,078.81/2,111.68
6. Step 6: Final answer
   x = 1,087.32