Finding the Fourth Proportional to 3,478.72, 5,218.12 and 1,013.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.72 : 5,218.12 = 1,013.56 : x
2. Step 2: Convert to fraction form
   3,478.72/5,218.12 = 1,013.56/x
3. Step 3: Cross multiply
   3,478.72x = 5,218.12 × 1,013.56
4. Step 4: Simplify right side
   3,478.72x = 5,288,877.71
5. Step 5: Solve for x
   x = 5,288,877.71/3,478.72
6. Step 6: Final answer
   x = 1,520.35