Finding the Third Proportional to 8,280 and 12,807

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280 : 12,807 = 12,807 : x
2. Step 2: Convert to fraction form
   8,280/12,807 = 12,807/x
3. Step 3: Cross multiply
   8,280x = 12,807 × 12,807
4. Step 4: Simplify right side
   8,280x = 164,019,249
5. Step 5: Solve for x
   x = 164,019,249/8,280
6. Step 6: Final answer
   x = 19,809.09