Finding the Third Proportional to 8,280 and 13,122

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280 : 13,122 = 13,122 : x
2. Step 2: Convert to fraction form
   8,280/13,122 = 13,122/x
3. Step 3: Cross multiply
   8,280x = 13,122 × 13,122
4. Step 4: Simplify right side
   8,280x = 172,186,884
5. Step 5: Solve for x
   x = 172,186,884/8,280
6. Step 6: Final answer
   x = 20,795.52