Finding the Fourth Proportional to 2,109, 3,163.25 and 722.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109 : 3,163.25 = 722.31 : x
2. Step 2: Convert to fraction form
   2,109/3,163.25 = 722.31/x
3. Step 3: Cross multiply
   2,109x = 3,163.25 × 722.31
4. Step 4: Simplify right side
   2,109x = 2,284,843.50
5. Step 5: Solve for x
   x = 2,284,843.50/2,109
6. Step 6: Final answer
   x = 1,083.38