Finding the Fourth Proportional to 1,040.28, 1,435.56 and 574.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.28 : 1,435.56 = 574.56 : x
2. Step 2: Convert to fraction form
   1,040.28/1,435.56 = 574.56/x
3. Step 3: Cross multiply
   1,040.28x = 1,435.56 × 574.56
4. Step 4: Simplify right side
   1,040.28x = 824,815.35
5. Step 5: Solve for x
   x = 824,815.35/1,040.28
6. Step 6: Final answer
   x = 792.88