Finding the Fourth Proportional to 1,040.40, 1,435.72 and 574.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.40 : 1,435.72 = 574.64 : x
2. Step 2: Convert to fraction form
   1,040.40/1,435.72 = 574.64/x
3. Step 3: Cross multiply
   1,040.40x = 1,435.72 × 574.64
4. Step 4: Simplify right side
   1,040.40x = 825,022.14
5. Step 5: Solve for x
   x = 825,022.14/1,040.40
6. Step 6: Final answer
   x = 792.99