Finding the Third Proportional to 13,606 and 20,345

Step by Step Solution

1. Step 1: Write the proportion equation
   13,606 : 20,345 = 20,345 : x
2. Step 2: Convert to fraction form
   13,606/20,345 = 20,345/x
3. Step 3: Cross multiply
   13,606x = 20,345 × 20,345
4. Step 4: Simplify right side
   13,606x = 413,919,025
5. Step 5: Solve for x
   x = 413,919,025/13,606
6. Step 6: Final answer
   x = 30,421.80