Finding the Fourth Proportional to 1,013.29, 1,398.47 and 571.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.29 : 1,398.47 = 571.33 : x
2. Step 2: Convert to fraction form
   1,013.29/1,398.47 = 571.33/x
3. Step 3: Cross multiply
   1,013.29x = 1,398.47 × 571.33
4. Step 4: Simplify right side
   1,013.29x = 798,978.02
5. Step 5: Solve for x
   x = 798,978.02/1,013.29
6. Step 6: Final answer
   x = 788.50