Finding the Fourth Proportional to 3,964.99, 5,471.79 and 2,196.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.99 : 5,471.79 = 2,196.76 : x
2. Step 2: Convert to fraction form
   3,964.99/5,471.79 = 2,196.76/x
3. Step 3: Cross multiply
   3,964.99x = 5,471.79 × 2,196.76
4. Step 4: Simplify right side
   3,964.99x = 12,020,182.04
5. Step 5: Solve for x
   x = 12,020,182.04/3,964.99
6. Step 6: Final answer
   x = 3,031.58