Finding the Third Proportional to 8,456 and 13,388

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456 : 13,388 = 13,388 : x
2. Step 2: Convert to fraction form
   8,456/13,388 = 13,388/x
3. Step 3: Cross multiply
   8,456x = 13,388 × 13,388
4. Step 4: Simplify right side
   8,456x = 179,238,544
5. Step 5: Solve for x
   x = 179,238,544/8,456
6. Step 6: Final answer
   x = 21,196.61