Finding the Fourth Proportional to 3,105.78, 4,280.52 and 2,762.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.78 : 4,280.52 = 2,762.25 : x
2. Step 2: Convert to fraction form
   3,105.78/4,280.52 = 2,762.25/x
3. Step 3: Cross multiply
   3,105.78x = 4,280.52 × 2,762.25
4. Step 4: Simplify right side
   3,105.78x = 11,823,866.37
5. Step 5: Solve for x
   x = 11,823,866.37/3,105.78
6. Step 6: Final answer
   x = 3,807.05