Finding the Third Proportional to 168,778.69 and 398,413.69

Step by Step Solution

1. Step 1: Write the proportion equation
   168,778.69 : 398,413.69 = 398,413.69 : x
2. Step 2: Convert to fraction form
   168,778.69/398,413.69 = 398,413.69/x
3. Step 3: Cross multiply
   168,778.69x = 398,413.69 × 398,413.69
4. Step 4: Simplify right side
   168,778.69x = 158,733,466,387.35
5. Step 5: Solve for x
   x = 158,733,466,387.35/168,778.69
6. Step 6: Final answer
   x = 940,482.88