Finding the Third Proportional to 8,410.78 and 12,162.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,410.78 : 12,162.09 = 12,162.09 : x
2. Step 2: Convert to fraction form
   8,410.78/12,162.09 = 12,162.09/x
3. Step 3: Cross multiply
   8,410.78x = 12,162.09 × 12,162.09
4. Step 4: Simplify right side
   8,410.78x = 147,916,524.38
5. Step 5: Solve for x
   x = 147,916,524.38/8,410.78
6. Step 6: Final answer
   x = 17,586.54