Finding the Third Proportional to 242,557 and 518,363.50

Step by Step Solution

1. Step 1: Write the proportion equation
   242,557 : 518,363.50 = 518,363.50 : x
2. Step 2: Convert to fraction form
   242,557/518,363.50 = 518,363.50/x
3. Step 3: Cross multiply
   242,557x = 518,363.50 × 518,363.50
4. Step 4: Simplify right side
   242,557x = 268,700,718,132.25
5. Step 5: Solve for x
   x = 268,700,718,132.25/242,557
6. Step 6: Final answer
   x = 1,107,783.81