Finding the Fourth Proportional to 3,478.10, 5,222.55 and 2,020.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.10 : 5,222.55 = 2,020.10 : x
2. Step 2: Convert to fraction form
   3,478.10/5,222.55 = 2,020.10/x
3. Step 3: Cross multiply
   3,478.10x = 5,222.55 × 2,020.10
4. Step 4: Simplify right side
   3,478.10x = 10,550,073.26
5. Step 5: Solve for x
   x = 10,550,073.26/3,478.10
6. Step 6: Final answer
   x = 3,033.29