Finding the Third Proportional to 8,812 and 12,885

Step by Step Solution

1. Step 1: Write the proportion equation
   8,812 : 12,885 = 12,885 : x
2. Step 2: Convert to fraction form
   8,812/12,885 = 12,885/x
3. Step 3: Cross multiply
   8,812x = 12,885 × 12,885
4. Step 4: Simplify right side
   8,812x = 166,023,225
5. Step 5: Solve for x
   x = 166,023,225/8,812
6. Step 6: Final answer
   x = 18,840.58