Finding the Fourth Proportional to 3,506.31, 5,258.56 and 1,040.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,506.31 : 5,258.56 = 1,040.55 : x
2. Step 2: Convert to fraction form
   3,506.31/5,258.56 = 1,040.55/x
3. Step 3: Cross multiply
   3,506.31x = 5,258.56 × 1,040.55
4. Step 4: Simplify right side
   3,506.31x = 5,471,803.82
5. Step 5: Solve for x
   x = 5,471,803.82/3,506.31
6. Step 6: Final answer
   x = 1,560.56