Finding the Third Proportional to 394,300.50 and 617,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,300.50 : 617,728.50 = 617,728.50 : x
2. Step 2: Convert to fraction form
   394,300.50/617,728.50 = 617,728.50/x
3. Step 3: Cross multiply
   394,300.50x = 617,728.50 × 617,728.50
4. Step 4: Simplify right side
   394,300.50x = 381,588,499,712.25
5. Step 5: Solve for x
   x = 381,588,499,712.25/394,300.50
6. Step 6: Final answer
   x = 967,760.63