Finding the Fourth Proportional to 3,505.30, 5,258.86 and 1,040.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,505.30 : 5,258.86 = 1,040.10 : x
2. Step 2: Convert to fraction form
   3,505.30/5,258.86 = 1,040.10/x
3. Step 3: Cross multiply
   3,505.30x = 5,258.86 × 1,040.10
4. Step 4: Simplify right side
   3,505.30x = 5,469,740.29
5. Step 5: Solve for x
   x = 5,469,740.29/3,505.30
6. Step 6: Final answer
   x = 1,560.42