Finding the Fourth Proportional to 4,078.10, 5,627.76 and 2,215.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,078.10 : 5,627.76 = 2,215.10 : x
2. Step 2: Convert to fraction form
   4,078.10/5,627.76 = 2,215.10/x
3. Step 3: Cross multiply
   4,078.10x = 5,627.76 × 2,215.10
4. Step 4: Simplify right side
   4,078.10x = 12,466,023.04
5. Step 5: Solve for x
   x = 12,466,023.04/4,078.10
6. Step 6: Final answer
   x = 3,056.83