Finding the Fourth Proportional to 3,505.31, 5,257.05 and 1,039.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,505.31 : 5,257.05 = 1,039.47 : x
2. Step 2: Convert to fraction form
   3,505.31/5,257.05 = 1,039.47/x
3. Step 3: Cross multiply
   3,505.31x = 5,257.05 × 1,039.47
4. Step 4: Simplify right side
   3,505.31x = 5,464,545.76
5. Step 5: Solve for x
   x = 5,464,545.76/3,505.31
6. Step 6: Final answer
   x = 1,558.93