Finding the Fourth Proportional to 1,015.30, 1,401.16 and 573.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.30 : 1,401.16 = 573.21 : x
2. Step 2: Convert to fraction form
   1,015.30/1,401.16 = 573.21/x
3. Step 3: Cross multiply
   1,015.30x = 1,401.16 × 573.21
4. Step 4: Simplify right side
   1,015.30x = 803,156.85
5. Step 5: Solve for x
   x = 803,156.85/1,015.30
6. Step 6: Final answer
   x = 791.05