Finding the Fourth Proportional to 1,015.83, 1,401.84 and 573.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.83 : 1,401.84 = 573.71 : x
2. Step 2: Convert to fraction form
   1,015.83/1,401.84 = 573.71/x
3. Step 3: Cross multiply
   1,015.83x = 1,401.84 × 573.71
4. Step 4: Simplify right side
   1,015.83x = 804,242.62
5. Step 5: Solve for x
   x = 804,242.62/1,015.83
6. Step 6: Final answer
   x = 791.71