Finding the Fourth Proportional to 2,825.79, 3,900.15 and 2,548.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,825.79 : 3,900.15 = 2,548.77 : x
2. Step 2: Convert to fraction form
   2,825.79/3,900.15 = 2,548.77/x
3. Step 3: Cross multiply
   2,825.79x = 3,900.15 × 2,548.77
4. Step 4: Simplify right side
   2,825.79x = 9,940,570.69
5. Step 5: Solve for x
   x = 9,940,570.69/2,825.79
6. Step 6: Final answer
   x = 3,517.81