Finding the Third Proportional to 10,640 and 13,760

Step by Step Solution

1. Step 1: Write the proportion equation
   10,640 : 13,760 = 13,760 : x
2. Step 2: Convert to fraction form
   10,640/13,760 = 13,760/x
3. Step 3: Cross multiply
   10,640x = 13,760 × 13,760
4. Step 4: Simplify right side
   10,640x = 189,337,600
5. Step 5: Solve for x
   x = 189,337,600/10,640
6. Step 6: Final answer
   x = 17,794.89