Finding the Third Proportional to 10,210 and 21,059

Step by Step Solution

1. Step 1: Write the proportion equation
   10,210 : 21,059 = 21,059 : x
2. Step 2: Convert to fraction form
   10,210/21,059 = 21,059/x
3. Step 3: Cross multiply
   10,210x = 21,059 × 21,059
4. Step 4: Simplify right side
   10,210x = 443,481,481
5. Step 5: Solve for x
   x = 443,481,481/10,210
6. Step 6: Final answer
   x = 43,435.99