Finding the Third Proportional to 1,243.69 and 2,617.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.69 : 2,617.31 = 2,617.31 : x
2. Step 2: Convert to fraction form
   1,243.69/2,617.31 = 2,617.31/x
3. Step 3: Cross multiply
   1,243.69x = 2,617.31 × 2,617.31
4. Step 4: Simplify right side
   1,243.69x = 6,850,324.72
5. Step 5: Solve for x
   x = 6,850,324.72/1,243.69
6. Step 6: Final answer
   x = 5,508.08