Finding the Third Proportional to 10,617 and 21,519

Step by Step Solution

1. Step 1: Write the proportion equation
   10,617 : 21,519 = 21,519 : x
2. Step 2: Convert to fraction form
   10,617/21,519 = 21,519/x
3. Step 3: Cross multiply
   10,617x = 21,519 × 21,519
4. Step 4: Simplify right side
   10,617x = 463,067,361
5. Step 5: Solve for x
   x = 463,067,361/10,617
6. Step 6: Final answer
   x = 43,615.65