Finding the Third Proportional to 10,279 and 21,287

Step by Step Solution

1. Step 1: Write the proportion equation
   10,279 : 21,287 = 21,287 : x
2. Step 2: Convert to fraction form
   10,279/21,287 = 21,287/x
3. Step 3: Cross multiply
   10,279x = 21,287 × 21,287
4. Step 4: Simplify right side
   10,279x = 453,136,369
5. Step 5: Solve for x
   x = 453,136,369/10,279
6. Step 6: Final answer
   x = 44,083.70