Finding the Third Proportional to 1,121.25 and 2,391.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121.25 : 2,391.38 = 2,391.38 : x
2. Step 2: Convert to fraction form
   1,121.25/2,391.38 = 2,391.38/x
3. Step 3: Cross multiply
   1,121.25x = 2,391.38 × 2,391.38
4. Step 4: Simplify right side
   1,121.25x = 5,718,674.39
5. Step 5: Solve for x
   x = 5,718,674.39/1,121.25
6. Step 6: Final answer
   x = 5,100.27