Finding the Third Proportional to 10,240 and 18,240

Step by Step Solution

1. Step 1: Write the proportion equation
   10,240 : 18,240 = 18,240 : x
2. Step 2: Convert to fraction form
   10,240/18,240 = 18,240/x
3. Step 3: Cross multiply
   10,240x = 18,240 × 18,240
4. Step 4: Simplify right side
   10,240x = 332,697,600
5. Step 5: Solve for x
   x = 332,697,600/10,240
6. Step 6: Final answer
   x = 32,490