Finding the Fourth Proportional to 2,822.76, 4,228.86 and 2,517.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,822.76 : 4,228.86 = 2,517.72 : x
2. Step 2: Convert to fraction form
   2,822.76/4,228.86 = 2,517.72/x
3. Step 3: Cross multiply
   2,822.76x = 4,228.86 × 2,517.72
4. Step 4: Simplify right side
   2,822.76x = 10,647,085.40
5. Step 5: Solve for x
   x = 10,647,085.40/2,822.76
6. Step 6: Final answer
   x = 3,771.87