Finding the Fourth Proportional to 1,013.83, 1,399.05 and 571.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.83 : 1,399.05 = 571.73 : x
2. Step 2: Convert to fraction form
   1,013.83/1,399.05 = 571.73/x
3. Step 3: Cross multiply
   1,013.83x = 1,399.05 × 571.73
4. Step 4: Simplify right side
   1,013.83x = 799,871.86
5. Step 5: Solve for x
   x = 799,871.86/1,013.83
6. Step 6: Final answer
   x = 788.96