Finding the Third Proportional to 12,722 and 17,851

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722 : 17,851 = 17,851 : x
2. Step 2: Convert to fraction form
   12,722/17,851 = 17,851/x
3. Step 3: Cross multiply
   12,722x = 17,851 × 17,851
4. Step 4: Simplify right side
   12,722x = 318,658,201
5. Step 5: Solve for x
   x = 318,658,201/12,722
6. Step 6: Final answer
   x = 25,047.81