Finding the Third Proportional to 12,722 and 18,505

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722 : 18,505 = 18,505 : x
2. Step 2: Convert to fraction form
   12,722/18,505 = 18,505/x
3. Step 3: Cross multiply
   12,722x = 18,505 × 18,505
4. Step 4: Simplify right side
   12,722x = 342,435,025
5. Step 5: Solve for x
   x = 342,435,025/12,722
6. Step 6: Final answer
   x = 26,916.76