Finding the Third Proportional to 10,560 and 21,423

Step by Step Solution

1. Step 1: Write the proportion equation
   10,560 : 21,423 = 21,423 : x
2. Step 2: Convert to fraction form
   10,560/21,423 = 21,423/x
3. Step 3: Cross multiply
   10,560x = 21,423 × 21,423
4. Step 4: Simplify right side
   10,560x = 458,944,929
5. Step 5: Solve for x
   x = 458,944,929/10,560
6. Step 6: Final answer
   x = 43,460.69