Finding the Fourth Proportional to 2,800.72, 3,860.94 and 2,210.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.72 : 3,860.94 = 2,210.20 : x
2. Step 2: Convert to fraction form
   2,800.72/3,860.94 = 2,210.20/x
3. Step 3: Cross multiply
   2,800.72x = 3,860.94 × 2,210.20
4. Step 4: Simplify right side
   2,800.72x = 8,533,449.59
5. Step 5: Solve for x
   x = 8,533,449.59/2,800.72
6. Step 6: Final answer
   x = 3,046.88