Finding the Third Proportional to 8,820 and 13,666

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820 : 13,666 = 13,666 : x
2. Step 2: Convert to fraction form
   8,820/13,666 = 13,666/x
3. Step 3: Cross multiply
   8,820x = 13,666 × 13,666
4. Step 4: Simplify right side
   8,820x = 186,759,556
5. Step 5: Solve for x
   x = 186,759,556/8,820
6. Step 6: Final answer
   x = 21,174.55