Finding the Fourth Proportional to 1,013.47, 1,398.59 and 571.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.47 : 1,398.59 = 571.37 : x
2. Step 2: Convert to fraction form
   1,013.47/1,398.59 = 571.37/x
3. Step 3: Cross multiply
   1,013.47x = 1,398.59 × 571.37
4. Step 4: Simplify right side
   1,013.47x = 799,109.51
5. Step 5: Solve for x
   x = 799,109.51/1,013.47
6. Step 6: Final answer
   x = 788.49