Finding the Third Proportional to 12,816 and 20,550

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816 : 20,550 = 20,550 : x
2. Step 2: Convert to fraction form
   12,816/20,550 = 20,550/x
3. Step 3: Cross multiply
   12,816x = 20,550 × 20,550
4. Step 4: Simplify right side
   12,816x = 422,302,500
5. Step 5: Solve for x
   x = 422,302,500/12,816
6. Step 6: Final answer
   x = 32,951.19