Finding the Third Proportional to 8,087 and 12,860

Step by Step Solution

1. Step 1: Write the proportion equation
   8,087 : 12,860 = 12,860 : x
2. Step 2: Convert to fraction form
   8,087/12,860 = 12,860/x
3. Step 3: Cross multiply
   8,087x = 12,860 × 12,860
4. Step 4: Simplify right side
   8,087x = 165,379,600
5. Step 5: Solve for x
   x = 165,379,600/8,087
6. Step 6: Final answer
   x = 20,450.06