Finding the Third Proportional to 603,561 and 905,413.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,561 : 905,413.50 = 905,413.50 : x
2. Step 2: Convert to fraction form
   603,561/905,413.50 = 905,413.50/x
3. Step 3: Cross multiply
   603,561x = 905,413.50 × 905,413.50
4. Step 4: Simplify right side
   603,561x = 819,773,605,982.25
5. Step 5: Solve for x
   x = 819,773,605,982.25/603,561
6. Step 6: Final answer
   x = 1,358,228.26