Finding the Fourth Proportional to 1,940.72, 2,678.29 and 1,144.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.72 : 2,678.29 = 1,144.07 : x
2. Step 2: Convert to fraction form
   1,940.72/2,678.29 = 1,144.07/x
3. Step 3: Cross multiply
   1,940.72x = 2,678.29 × 1,144.07
4. Step 4: Simplify right side
   1,940.72x = 3,064,138.82
5. Step 5: Solve for x
   x = 3,064,138.82/1,940.72
6. Step 6: Final answer
   x = 1,578.87