Finding the Fourth Proportional to 3,968.82, 5,477.10 and 2,290.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968.82 : 5,477.10 = 2,290.31 : x
2. Step 2: Convert to fraction form
   3,968.82/5,477.10 = 2,290.31/x
3. Step 3: Cross multiply
   3,968.82x = 5,477.10 × 2,290.31
4. Step 4: Simplify right side
   3,968.82x = 12,544,229.52
5. Step 5: Solve for x
   x = 12,544,229.52/3,968.82
6. Step 6: Final answer
   x = 3,160.69