Finding the Fourth Proportional to 3,965.04, 5,471.79 and 2,196.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.04 : 5,471.79 = 2,196.69 : x
2. Step 2: Convert to fraction form
   3,965.04/5,471.79 = 2,196.69/x
3. Step 3: Cross multiply
   3,965.04x = 5,471.79 × 2,196.69
4. Step 4: Simplify right side
   3,965.04x = 12,019,826.38
5. Step 5: Solve for x
   x = 12,019,826.38/3,965.04
6. Step 6: Final answer
   x = 3,031.45