Finding the Fourth Proportional to 3,478.50, 5,218.02 and 1,013.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.50 : 5,218.02 = 1,013.31 : x
2. Step 2: Convert to fraction form
   3,478.50/5,218.02 = 1,013.31/x
3. Step 3: Cross multiply
   3,478.50x = 5,218.02 × 1,013.31
4. Step 4: Simplify right side
   3,478.50x = 5,287,471.85
5. Step 5: Solve for x
   x = 5,287,471.85/3,478.50
6. Step 6: Final answer
   x = 1,520.04