Finding the Third Proportional to 10,398 and 21,282

Step by Step Solution

1. Step 1: Write the proportion equation
   10,398 : 21,282 = 21,282 : x
2. Step 2: Convert to fraction form
   10,398/21,282 = 21,282/x
3. Step 3: Cross multiply
   10,398x = 21,282 × 21,282
4. Step 4: Simplify right side
   10,398x = 452,923,524
5. Step 5: Solve for x
   x = 452,923,524/10,398
6. Step 6: Final answer
   x = 43,558.72