Finding the Third Proportional to 363,705 and 789,616.50

Step by Step Solution

1. Step 1: Write the proportion equation
   363,705 : 789,616.50 = 789,616.50 : x
2. Step 2: Convert to fraction form
   363,705/789,616.50 = 789,616.50/x
3. Step 3: Cross multiply
   363,705x = 789,616.50 × 789,616.50
4. Step 4: Simplify right side
   363,705x = 623,494,217,072.25
5. Step 5: Solve for x
   x = 623,494,217,072.25/363,705
6. Step 6: Final answer
   x = 1,714,285.53