Finding the Third Proportional to 381,976.50 and 809,487

Step by Step Solution

1. Step 1: Write the proportion equation
   381,976.50 : 809,487 = 809,487 : x
2. Step 2: Convert to fraction form
   381,976.50/809,487 = 809,487/x
3. Step 3: Cross multiply
   381,976.50x = 809,487 × 809,487
4. Step 4: Simplify right side
   381,976.50x = 655,269,203,169
5. Step 5: Solve for x
   x = 655,269,203,169/381,976.50
6. Step 6: Final answer
   x = 1,715,469.94