Finding the Fourth Proportional to 1,013.52, 1,398.66 and 571.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.52 : 1,398.66 = 571.42 : x
2. Step 2: Convert to fraction form
   1,013.52/1,398.66 = 571.42/x
3. Step 3: Cross multiply
   1,013.52x = 1,398.66 × 571.42
4. Step 4: Simplify right side
   1,013.52x = 799,222.30
5. Step 5: Solve for x
   x = 799,222.30/1,013.52
6. Step 6: Final answer
   x = 788.56