Finding the Fourth Proportional to 3,020.10, 4,219.50 and 3,020.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,020.10 : 4,219.50 = 3,020.10 : x
2. Step 2: Convert to fraction form
   3,020.10/4,219.50 = 3,020.10/x
3. Step 3: Cross multiply
   3,020.10x = 4,219.50 × 3,020.10
4. Step 4: Simplify right side
   3,020.10x = 12,743,311.95
5. Step 5: Solve for x
   x = 12,743,311.95/3,020.10
6. Step 6: Final answer
   x = 4,219.50