Finding the Third Proportional to 10,820 and 12,260

Step by Step Solution

1. Step 1: Write the proportion equation
   10,820 : 12,260 = 12,260 : x
2. Step 2: Convert to fraction form
   10,820/12,260 = 12,260/x
3. Step 3: Cross multiply
   10,820x = 12,260 × 12,260
4. Step 4: Simplify right side
   10,820x = 150,307,600
5. Step 5: Solve for x
   x = 150,307,600/10,820
6. Step 6: Final answer
   x = 13,891.65