Finding the Third Proportional to 394,297.50 and 617,724

Step by Step Solution

1. Step 1: Write the proportion equation
   394,297.50 : 617,724 = 617,724 : x
2. Step 2: Convert to fraction form
   394,297.50/617,724 = 617,724/x
3. Step 3: Cross multiply
   394,297.50x = 617,724 × 617,724
4. Step 4: Simplify right side
   394,297.50x = 381,582,940,176
5. Step 5: Solve for x
   x = 381,582,940,176/394,297.50
6. Step 6: Final answer
   x = 967,753.89