Finding the Fourth Proportional to 1,015.92, 1,401.94 and 573.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.92 : 1,401.94 = 573.80 : x
2. Step 2: Convert to fraction form
   1,015.92/1,401.94 = 573.80/x
3. Step 3: Cross multiply
   1,015.92x = 1,401.94 × 573.80
4. Step 4: Simplify right side
   1,015.92x = 804,433.17
5. Step 5: Solve for x
   x = 804,433.17/1,015.92
6. Step 6: Final answer
   x = 791.83