Finding the Fourth Proportional to 3,969.15, 5,477.04 and 2,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969.15 : 5,477.04 = 2,200.72 : x
2. Step 2: Convert to fraction form
   3,969.15/5,477.04 = 2,200.72/x
3. Step 3: Cross multiply
   3,969.15x = 5,477.04 × 2,200.72
4. Step 4: Simplify right side
   3,969.15x = 12,053,431.47
5. Step 5: Solve for x
   x = 12,053,431.47/3,969.15
6. Step 6: Final answer
   x = 3,036.78