Finding the Third Proportional to 8,638 and 18,892

Step by Step Solution

1. Step 1: Write the proportion equation
   8,638 : 18,892 = 18,892 : x
2. Step 2: Convert to fraction form
   8,638/18,892 = 18,892/x
3. Step 3: Cross multiply
   8,638x = 18,892 × 18,892
4. Step 4: Simplify right side
   8,638x = 356,907,664
5. Step 5: Solve for x
   x = 356,907,664/8,638
6. Step 6: Final answer
   x = 41,318.32