Finding the Third Proportional to 10,920 and 17,556

Step by Step Solution

1. Step 1: Write the proportion equation
   10,920 : 17,556 = 17,556 : x
2. Step 2: Convert to fraction form
   10,920/17,556 = 17,556/x
3. Step 3: Cross multiply
   10,920x = 17,556 × 17,556
4. Step 4: Simplify right side
   10,920x = 308,213,136
5. Step 5: Solve for x
   x = 308,213,136/10,920
6. Step 6: Final answer
   x = 28,224.65