Finding the Fourth Proportional to 1,013.94, 1,399.28 and 571.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.94 : 1,399.28 = 571.82 : x
2. Step 2: Convert to fraction form
   1,013.94/1,399.28 = 571.82/x
3. Step 3: Cross multiply
   1,013.94x = 1,399.28 × 571.82
4. Step 4: Simplify right side
   1,013.94x = 800,126.43
5. Step 5: Solve for x
   x = 800,126.43/1,013.94
6. Step 6: Final answer
   x = 789.13