Finding the Third Proportional to 5,266 and 10,684

Step by Step Solution

1. Step 1: Write the proportion equation
   5,266 : 10,684 = 10,684 : x
2. Step 2: Convert to fraction form
   5,266/10,684 = 10,684/x
3. Step 3: Cross multiply
   5,266x = 10,684 × 10,684
4. Step 4: Simplify right side
   5,266x = 114,147,856
5. Step 5: Solve for x
   x = 114,147,856/5,266
6. Step 6: Final answer
   x = 21,676.39