Finding the Third Proportional to 10,863 and 12,831

Step by Step Solution

1. Step 1: Write the proportion equation
   10,863 : 12,831 = 12,831 : x
2. Step 2: Convert to fraction form
   10,863/12,831 = 12,831/x
3. Step 3: Cross multiply
   10,863x = 12,831 × 12,831
4. Step 4: Simplify right side
   10,863x = 164,634,561
5. Step 5: Solve for x
   x = 164,634,561/10,863
6. Step 6: Final answer
   x = 15,155.53