Finding the Fourth Proportional to 1,413.69, 1,950.78 and 815.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.69 : 1,950.78 = 815.97 : x
2. Step 2: Convert to fraction form
   1,413.69/1,950.78 = 815.97/x
3. Step 3: Cross multiply
   1,413.69x = 1,950.78 × 815.97
4. Step 4: Simplify right side
   1,413.69x = 1,591,788.33
5. Step 5: Solve for x
   x = 1,591,788.33/1,413.69
6. Step 6: Final answer
   x = 1,125.98