Finding the Third Proportional to 8,280 and 12,384

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280 : 12,384 = 12,384 : x
2. Step 2: Convert to fraction form
   8,280/12,384 = 12,384/x
3. Step 3: Cross multiply
   8,280x = 12,384 × 12,384
4. Step 4: Simplify right side
   8,280x = 153,363,456
5. Step 5: Solve for x
   x = 153,363,456/8,280
6. Step 6: Final answer
   x = 18,522.16