Finding the Third Proportional to 16,398 and 21,804

Step by Step Solution

1. Step 1: Write the proportion equation
   16,398 : 21,804 = 21,804 : x
2. Step 2: Convert to fraction form
   16,398/21,804 = 21,804/x
3. Step 3: Cross multiply
   16,398x = 21,804 × 21,804
4. Step 4: Simplify right side
   16,398x = 475,414,416
5. Step 5: Solve for x
   x = 475,414,416/16,398
6. Step 6: Final answer
   x = 28,992.22