Finding the Fourth Proportional to 1,144.38, 1,578.06 and 979.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.38 : 1,578.06 = 979.14 : x
2. Step 2: Convert to fraction form
   1,144.38/1,578.06 = 979.14/x
3. Step 3: Cross multiply
   1,144.38x = 1,578.06 × 979.14
4. Step 4: Simplify right side
   1,144.38x = 1,545,131.33
5. Step 5: Solve for x
   x = 1,545,131.33/1,144.38
6. Step 6: Final answer
   x = 1,350.20