Finding the Fourth Proportional to 3,964.55, 5,471.15 and 2,196.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.55 : 5,471.15 = 2,196.11 : x
2. Step 2: Convert to fraction form
   3,964.55/5,471.15 = 2,196.11/x
3. Step 3: Cross multiply
   3,964.55x = 5,471.15 × 2,196.11
4. Step 4: Simplify right side
   3,964.55x = 12,015,249.92
5. Step 5: Solve for x
   x = 12,015,249.92/3,964.55
6. Step 6: Final answer
   x = 3,030.68