Finding the Third Proportional to 9,480 and 10,920

Step by Step Solution

1. Step 1: Write the proportion equation
   9,480 : 10,920 = 10,920 : x
2. Step 2: Convert to fraction form
   9,480/10,920 = 10,920/x
3. Step 3: Cross multiply
   9,480x = 10,920 × 10,920
4. Step 4: Simplify right side
   9,480x = 119,246,400
5. Step 5: Solve for x
   x = 119,246,400/9,480
6. Step 6: Final answer
   x = 12,578.73