Finding the Third Proportional to 8,480 and 10,256

Step by Step Solution

1. Step 1: Write the proportion equation
   8,480 : 10,256 = 10,256 : x
2. Step 2: Convert to fraction form
   8,480/10,256 = 10,256/x
3. Step 3: Cross multiply
   8,480x = 10,256 × 10,256
4. Step 4: Simplify right side
   8,480x = 105,185,536
5. Step 5: Solve for x
   x = 105,185,536/8,480
6. Step 6: Final answer
   x = 12,403.95