Finding the Third Proportional to 9,900 and 18,886

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900 : 18,886 = 18,886 : x
2. Step 2: Convert to fraction form
   9,900/18,886 = 18,886/x
3. Step 3: Cross multiply
   9,900x = 18,886 × 18,886
4. Step 4: Simplify right side
   9,900x = 356,680,996
5. Step 5: Solve for x
   x = 356,680,996/9,900
6. Step 6: Final answer
   x = 36,028.38