Finding the Third Proportional to 8,435 and 13,406

Step by Step Solution

1. Step 1: Write the proportion equation
   8,435 : 13,406 = 13,406 : x
2. Step 2: Convert to fraction form
   8,435/13,406 = 13,406/x
3. Step 3: Cross multiply
   8,435x = 13,406 × 13,406
4. Step 4: Simplify right side
   8,435x = 179,720,836
5. Step 5: Solve for x
   x = 179,720,836/8,435
6. Step 6: Final answer
   x = 21,306.56