Finding the Fourth Proportional to 2,772.13, 3,826.01 and 2,647.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.13 : 3,826.01 = 2,647.57 : x
2. Step 2: Convert to fraction form
   2,772.13/3,826.01 = 2,647.57/x
3. Step 3: Cross multiply
   2,772.13x = 3,826.01 × 2,647.57
4. Step 4: Simplify right side
   2,772.13x = 10,129,629.30
5. Step 5: Solve for x
   x = 10,129,629.30/2,772.13
6. Step 6: Final answer
   x = 3,654.10