Finding the Fourth Proportional to 1,040.25, 1,435.55 and 568.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.25 : 1,435.55 = 568.15 : x
2. Step 2: Convert to fraction form
   1,040.25/1,435.55 = 568.15/x
3. Step 3: Cross multiply
   1,040.25x = 1,435.55 × 568.15
4. Step 4: Simplify right side
   1,040.25x = 815,606.69
5. Step 5: Solve for x
   x = 815,606.69/1,040.25
6. Step 6: Final answer
   x = 784.05