Finding the Third Proportional to 10,238 and 21,507

Step by Step Solution

1. Step 1: Write the proportion equation
   10,238 : 21,507 = 21,507 : x
2. Step 2: Convert to fraction form
   10,238/21,507 = 21,507/x
3. Step 3: Cross multiply
   10,238x = 21,507 × 21,507
4. Step 4: Simplify right side
   10,238x = 462,551,049
5. Step 5: Solve for x
   x = 462,551,049/10,238
6. Step 6: Final answer
   x = 45,179.83