Finding the Fourth Proportional to 2,109.25, 3,163.92 and 722.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.25 : 3,163.92 = 722.58 : x
2. Step 2: Convert to fraction form
   2,109.25/3,163.92 = 722.58/x
3. Step 3: Cross multiply
   2,109.25x = 3,163.92 × 722.58
4. Step 4: Simplify right side
   2,109.25x = 2,286,185.31
5. Step 5: Solve for x
   x = 2,286,185.31/2,109.25
6. Step 6: Final answer
   x = 1,083.89