Finding the Fourth Proportional to 3,965.07, 5,471.79 and 2,196.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.07 : 5,471.79 = 2,196.79 : x
2. Step 2: Convert to fraction form
   3,965.07/5,471.79 = 2,196.79/x
3. Step 3: Cross multiply
   3,965.07x = 5,471.79 × 2,196.79
4. Step 4: Simplify right side
   3,965.07x = 12,020,335.21
5. Step 5: Solve for x
   x = 12,020,335.21/3,965.07
6. Step 6: Final answer
   x = 3,031.56