Finding the Fourth Proportional to 1,013.98, 1,399.22 and 571.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.98 : 1,399.22 = 571.94 : x
2. Step 2: Convert to fraction form
   1,013.98/1,399.22 = 571.94/x
3. Step 3: Cross multiply
   1,013.98x = 1,399.22 × 571.94
4. Step 4: Simplify right side
   1,013.98x = 800,269.89
5. Step 5: Solve for x
   x = 800,269.89/1,013.98
6. Step 6: Final answer
   x = 789.24