Finding the Third Proportional to 16,199 and 20,699

Step by Step Solution

1. Step 1: Write the proportion equation
   16,199 : 20,699 = 20,699 : x
2. Step 2: Convert to fraction form
   16,199/20,699 = 20,699/x
3. Step 3: Cross multiply
   16,199x = 20,699 × 20,699
4. Step 4: Simplify right side
   16,199x = 428,448,601
5. Step 5: Solve for x
   x = 428,448,601/16,199
6. Step 6: Final answer
   x = 26,449.08