Finding the Third Proportional to 12,772 and 20,388

Step by Step Solution

1. Step 1: Write the proportion equation
   12,772 : 20,388 = 20,388 : x
2. Step 2: Convert to fraction form
   12,772/20,388 = 20,388/x
3. Step 3: Cross multiply
   12,772x = 20,388 × 20,388
4. Step 4: Simplify right side
   12,772x = 415,670,544
5. Step 5: Solve for x
   x = 415,670,544/12,772
6. Step 6: Final answer
   x = 32,545.45