Finding the Fourth Proportional to 1,015.69, 1,401.74 and 573.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.69 : 1,401.74 = 573.60 : x
2. Step 2: Convert to fraction form
   1,015.69/1,401.74 = 573.60/x
3. Step 3: Cross multiply
   1,015.69x = 1,401.74 × 573.60
4. Step 4: Simplify right side
   1,015.69x = 804,038.06
5. Step 5: Solve for x
   x = 804,038.06/1,015.69
6. Step 6: Final answer
   x = 791.62