Finding the Fourth Proportional to 1,015.74, 1,401.75 and 573.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.74 : 1,401.75 = 573.62 : x
2. Step 2: Convert to fraction form
   1,015.74/1,401.75 = 573.62/x
3. Step 3: Cross multiply
   1,015.74x = 1,401.75 × 573.62
4. Step 4: Simplify right side
   1,015.74x = 804,064.83
5. Step 5: Solve for x
   x = 804,064.83/1,015.74
6. Step 6: Final answer
   x = 791.60