Finding the Fourth Proportional to 1,499.09, 2,249.78 and 978.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.09 : 2,249.78 = 978.95 : x
2. Step 2: Convert to fraction form
   1,499.09/2,249.78 = 978.95/x
3. Step 3: Cross multiply
   1,499.09x = 2,249.78 × 978.95
4. Step 4: Simplify right side
   1,499.09x = 2,202,413.33
5. Step 5: Solve for x
   x = 2,202,413.33/1,499.09
6. Step 6: Final answer
   x = 1,469.17