Finding the Third Proportional to 12,856 and 20,372

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856 : 20,372 = 20,372 : x
2. Step 2: Convert to fraction form
   12,856/20,372 = 20,372/x
3. Step 3: Cross multiply
   12,856x = 20,372 × 20,372
4. Step 4: Simplify right side
   12,856x = 415,018,384
5. Step 5: Solve for x
   x = 415,018,384/12,856
6. Step 6: Final answer
   x = 32,282.08