Finding the Fourth Proportional to 1,013.34, 1,398.50 and 571.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.34 : 1,398.50 = 571.33 : x
2. Step 2: Convert to fraction form
   1,013.34/1,398.50 = 571.33/x
3. Step 3: Cross multiply
   1,013.34x = 1,398.50 × 571.33
4. Step 4: Simplify right side
   1,013.34x = 799,005.01
5. Step 5: Solve for x
   x = 799,005.01/1,013.34
6. Step 6: Final answer
   x = 788.49