Finding the Third Proportional to 10,138 and 21,080

Step by Step Solution

1. Step 1: Write the proportion equation
   10,138 : 21,080 = 21,080 : x
2. Step 2: Convert to fraction form
   10,138/21,080 = 21,080/x
3. Step 3: Cross multiply
   10,138x = 21,080 × 21,080
4. Step 4: Simplify right side
   10,138x = 444,366,400
5. Step 5: Solve for x
   x = 444,366,400/10,138
6. Step 6: Final answer
   x = 43,831.76