Finding the Fourth Proportional to 2,111.25, 3,166.92 and 724.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.25 : 3,166.92 = 724.58 : x
2. Step 2: Convert to fraction form
   2,111.25/3,166.92 = 724.58/x
3. Step 3: Cross multiply
   2,111.25x = 3,166.92 × 724.58
4. Step 4: Simplify right side
   2,111.25x = 2,294,686.89
5. Step 5: Solve for x
   x = 2,294,686.89/2,111.25
6. Step 6: Final answer
   x = 1,086.89