Finding the Third Proportional to 50,728 and 78,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50,728 : 78,855.50 = 78,855.50 : x
2. Step 2: Convert to fraction form
   50,728/78,855.50 = 78,855.50/x
3. Step 3: Cross multiply
   50,728x = 78,855.50 × 78,855.50
4. Step 4: Simplify right side
   50,728x = 6,218,189,880.25
5. Step 5: Solve for x
   x = 6,218,189,880.25/50,728
6. Step 6: Final answer
   x = 122,579.05