Finding the Fourth Proportional to 3,969.24, 5,477.34 and 2,200.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969.24 : 5,477.34 = 2,200.80 : x
2. Step 2: Convert to fraction form
   3,969.24/5,477.34 = 2,200.80/x
3. Step 3: Cross multiply
   3,969.24x = 5,477.34 × 2,200.80
4. Step 4: Simplify right side
   3,969.24x = 12,054,529.87
5. Step 5: Solve for x
   x = 12,054,529.87/3,969.24
6. Step 6: Final answer
   x = 3,036.99