Finding the Fourth Proportional to 1,143.69, 1,718.90 and 949.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.69 : 1,718.90 = 949.94 : x
2. Step 2: Convert to fraction form
   1,143.69/1,718.90 = 949.94/x
3. Step 3: Cross multiply
   1,143.69x = 1,718.90 × 949.94
4. Step 4: Simplify right side
   1,143.69x = 1,632,838.52
5. Step 5: Solve for x
   x = 1,632,838.52/1,143.69
6. Step 6: Final answer
   x = 1,427.69