Finding the Fourth Proportional to 1,015.68, 1,401.52 and 573.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.68 : 1,401.52 = 573.57 : x
2. Step 2: Convert to fraction form
   1,015.68/1,401.52 = 573.57/x
3. Step 3: Cross multiply
   1,015.68x = 1,401.52 × 573.57
4. Step 4: Simplify right side
   1,015.68x = 803,869.83
5. Step 5: Solve for x
   x = 803,869.83/1,015.68
6. Step 6: Final answer
   x = 791.46