Finding the Third Proportional to 508,923 and 788,413.50

Step by Step Solution

1. Step 1: Write the proportion equation
   508,923 : 788,413.50 = 788,413.50 : x
2. Step 2: Convert to fraction form
   508,923/788,413.50 = 788,413.50/x
3. Step 3: Cross multiply
   508,923x = 788,413.50 × 788,413.50
4. Step 4: Simplify right side
   508,923x = 621,595,846,982.25
5. Step 5: Solve for x
   x = 621,595,846,982.25/508,923
6. Step 6: Final answer
   x = 1,221,394.68