Finding the Third Proportional to 8,820 and 12,902

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820 : 12,902 = 12,902 : x
2. Step 2: Convert to fraction form
   8,820/12,902 = 12,902/x
3. Step 3: Cross multiply
   8,820x = 12,902 × 12,902
4. Step 4: Simplify right side
   8,820x = 166,461,604
5. Step 5: Solve for x
   x = 166,461,604/8,820
6. Step 6: Final answer
   x = 18,873.20