Finding the Third Proportional to 12,072 and 20,616

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072 : 20,616 = 20,616 : x
2. Step 2: Convert to fraction form
   12,072/20,616 = 20,616/x
3. Step 3: Cross multiply
   12,072x = 20,616 × 20,616
4. Step 4: Simplify right side
   12,072x = 425,019,456
5. Step 5: Solve for x
   x = 425,019,456/12,072
6. Step 6: Final answer
   x = 35,207.05