Finding the Fourth Proportional to 1,013.41, 1,398.54 and 571.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.41 : 1,398.54 = 571.35 : x
2. Step 2: Convert to fraction form
   1,013.41/1,398.54 = 571.35/x
3. Step 3: Cross multiply
   1,013.41x = 1,398.54 × 571.35
4. Step 4: Simplify right side
   1,013.41x = 799,061.61
5. Step 5: Solve for x
   x = 799,061.61/1,013.41
6. Step 6: Final answer
   x = 788.49