Finding the Third Proportional to 8,812 and 12,886

Step by Step Solution

1. Step 1: Write the proportion equation
   8,812 : 12,886 = 12,886 : x
2. Step 2: Convert to fraction form
   8,812/12,886 = 12,886/x
3. Step 3: Cross multiply
   8,812x = 12,886 × 12,886
4. Step 4: Simplify right side
   8,812x = 166,048,996
5. Step 5: Solve for x
   x = 166,048,996/8,812
6. Step 6: Final answer
   x = 18,843.51