Finding the Fourth Proportional to 1,015.72, 1,401.68 and 573.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.72 : 1,401.68 = 573.56 : x
2. Step 2: Convert to fraction form
   1,015.72/1,401.68 = 573.56/x
3. Step 3: Cross multiply
   1,015.72x = 1,401.68 × 573.56
4. Step 4: Simplify right side
   1,015.72x = 803,947.58
5. Step 5: Solve for x
   x = 803,947.58/1,015.72
6. Step 6: Final answer
   x = 791.51