Finding the Third Proportional to 8,136 and 13,080

Step by Step Solution

1. Step 1: Write the proportion equation
   8,136 : 13,080 = 13,080 : x
2. Step 2: Convert to fraction form
   8,136/13,080 = 13,080/x
3. Step 3: Cross multiply
   8,136x = 13,080 × 13,080
4. Step 4: Simplify right side
   8,136x = 171,086,400
5. Step 5: Solve for x
   x = 171,086,400/8,136
6. Step 6: Final answer
   x = 21,028.32