Finding the Third Proportional to 13,659 and 20,271

Step by Step Solution

1. Step 1: Write the proportion equation
   13,659 : 20,271 = 20,271 : x
2. Step 2: Convert to fraction form
   13,659/20,271 = 20,271/x
3. Step 3: Cross multiply
   13,659x = 20,271 × 20,271
4. Step 4: Simplify right side
   13,659x = 410,913,441
5. Step 5: Solve for x
   x = 410,913,441/13,659
6. Step 6: Final answer
   x = 30,083.71