Finding the Fourth Proportional to 3,505.59, 5,256.51 and 1,040.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,505.59 : 5,256.51 = 1,040.09 : x
2. Step 2: Convert to fraction form
   3,505.59/5,256.51 = 1,040.09/x
3. Step 3: Cross multiply
   3,505.59x = 5,256.51 × 1,040.09
4. Step 4: Simplify right side
   3,505.59x = 5,467,217.20
5. Step 5: Solve for x
   x = 5,467,217.20/3,505.59
6. Step 6: Final answer
   x = 1,559.57