Finding the Third Proportional to 1,243.69 and 1,324.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.69 : 1,324.69 = 1,324.69 : x
2. Step 2: Convert to fraction form
   1,243.69/1,324.69 = 1,324.69/x
3. Step 3: Cross multiply
   1,243.69x = 1,324.69 × 1,324.69
4. Step 4: Simplify right side
   1,243.69x = 1,754,796.97
5. Step 5: Solve for x
   x = 1,754,796.97/1,243.69
6. Step 6: Final answer
   x = 1,410.96