Finding the Third Proportional to 10,280 and 21,289

Step by Step Solution

1. Step 1: Write the proportion equation
   10,280 : 21,289 = 21,289 : x
2. Step 2: Convert to fraction form
   10,280/21,289 = 21,289/x
3. Step 3: Cross multiply
   10,280x = 21,289 × 21,289
4. Step 4: Simplify right side
   10,280x = 453,221,521
5. Step 5: Solve for x
   x = 453,221,521/10,280
6. Step 6: Final answer
   x = 44,087.70