Finding the Third Proportional to 10,240 and 21,573

Step by Step Solution

1. Step 1: Write the proportion equation
   10,240 : 21,573 = 21,573 : x
2. Step 2: Convert to fraction form
   10,240/21,573 = 21,573/x
3. Step 3: Cross multiply
   10,240x = 21,573 × 21,573
4. Step 4: Simplify right side
   10,240x = 465,394,329
5. Step 5: Solve for x
   x = 465,394,329/10,240
6. Step 6: Final answer
   x = 45,448.66