Finding the Third Proportional to 7,779 and 10,480

Step by Step Solution

1. Step 1: Write the proportion equation
   7,779 : 10,480 = 10,480 : x
2. Step 2: Convert to fraction form
   7,779/10,480 = 10,480/x
3. Step 3: Cross multiply
   7,779x = 10,480 × 10,480
4. Step 4: Simplify right side
   7,779x = 109,830,400
5. Step 5: Solve for x
   x = 109,830,400/7,779
6. Step 6: Final answer
   x = 14,118.83