Finding the Fourth Proportional to 1,015.62, 1,401.59 and 573.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.62 : 1,401.59 = 573.60 : x
2. Step 2: Convert to fraction form
   1,015.62/1,401.59 = 573.60/x
3. Step 3: Cross multiply
   1,015.62x = 1,401.59 × 573.60
4. Step 4: Simplify right side
   1,015.62x = 803,942.15
5. Step 5: Solve for x
   x = 803,942.15/1,015.62
6. Step 6: Final answer
   x = 791.58