Finding the Third Proportional to 12,780 and 20,484

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780 : 20,484 = 20,484 : x
2. Step 2: Convert to fraction form
   12,780/20,484 = 20,484/x
3. Step 3: Cross multiply
   12,780x = 20,484 × 20,484
4. Step 4: Simplify right side
   12,780x = 419,594,256
5. Step 5: Solve for x
   x = 419,594,256/12,780
6. Step 6: Final answer
   x = 32,832.10