Finding the Fourth Proportional to 1,015.67, 1,401.55 and 573.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.67 : 1,401.55 = 573.48 : x
2. Step 2: Convert to fraction form
   1,015.67/1,401.55 = 573.48/x
3. Step 3: Cross multiply
   1,015.67x = 1,401.55 × 573.48
4. Step 4: Simplify right side
   1,015.67x = 803,760.89
5. Step 5: Solve for x
   x = 803,760.89/1,015.67
6. Step 6: Final answer
   x = 791.36