Finding the Third Proportional to 356,612 and 769,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,612 : 769,399.50 = 769,399.50 : x
2. Step 2: Convert to fraction form
   356,612/769,399.50 = 769,399.50/x
3. Step 3: Cross multiply
   356,612x = 769,399.50 × 769,399.50
4. Step 4: Simplify right side
   356,612x = 591,975,590,600.25
5. Step 5: Solve for x
   x = 591,975,590,600.25/356,612
6. Step 6: Final answer
   x = 1,659,999.08