Finding the Fourth Proportional to 2,826, 3,899.88 and 1,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826 : 3,899.88 = 1,647.72 : x
2. Step 2: Convert to fraction form
   2,826/3,899.88 = 1,647.72/x
3. Step 3: Cross multiply
   2,826x = 3,899.88 × 1,647.72
4. Step 4: Simplify right side
   2,826x = 6,425,910.27
5. Step 5: Solve for x
   x = 6,425,910.27/2,826
6. Step 6: Final answer
   x = 2,273.85