Finding the Third Proportional to 383,413.50 and 806,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   383,413.50 : 806,485.50 = 806,485.50 : x
2. Step 2: Convert to fraction form
   383,413.50/806,485.50 = 806,485.50/x
3. Step 3: Cross multiply
   383,413.50x = 806,485.50 × 806,485.50
4. Step 4: Simplify right side
   383,413.50x = 650,418,861,710.25
5. Step 5: Solve for x
   x = 650,418,861,710.25/383,413.50
6. Step 6: Final answer
   x = 1,696,390.09