Finding the Fourth Proportional to 1,040.50, 1,435.92 and 574.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.50 : 1,435.92 = 574.78 : x
2. Step 2: Convert to fraction form
   1,040.50/1,435.92 = 574.78/x
3. Step 3: Cross multiply
   1,040.50x = 1,435.92 × 574.78
4. Step 4: Simplify right side
   1,040.50x = 825,338.10
5. Step 5: Solve for x
   x = 825,338.10/1,040.50
6. Step 6: Final answer
   x = 793.21