Finding the Third Proportional to 16,407 and 17,811

Step by Step Solution

1. Step 1: Write the proportion equation
   16,407 : 17,811 = 17,811 : x
2. Step 2: Convert to fraction form
   16,407/17,811 = 17,811/x
3. Step 3: Cross multiply
   16,407x = 17,811 × 17,811
4. Step 4: Simplify right side
   16,407x = 317,231,721
5. Step 5: Solve for x
   x = 317,231,721/16,407
6. Step 6: Final answer
   x = 19,335.14