Finding the Third Proportional to 16,200 and 20,700

Step by Step Solution

1. Step 1: Write the proportion equation
   16,200 : 20,700 = 20,700 : x
2. Step 2: Convert to fraction form
   16,200/20,700 = 20,700/x
3. Step 3: Cross multiply
   16,200x = 20,700 × 20,700
4. Step 4: Simplify right side
   16,200x = 428,490,000
5. Step 5: Solve for x
   x = 428,490,000/16,200
6. Step 6: Final answer
   x = 26,450