Finding the Third Proportional to 940.78 and 1,108.69

Step by Step Solution

1. Step 1: Write the proportion equation
   940.78 : 1,108.69 = 1,108.69 : x
2. Step 2: Convert to fraction form
   940.78/1,108.69 = 1,108.69/x
3. Step 3: Cross multiply
   940.78x = 1,108.69 × 1,108.69
4. Step 4: Simplify right side
   940.78x = 1,229,187.97
5. Step 5: Solve for x
   x = 1,229,187.97/940.78
6. Step 6: Final answer
   x = 1,306.56