Finding the Fourth Proportional to 3,965.29, 5,472.20 and 2,196.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.29 : 5,472.20 = 2,196.86 : x
2. Step 2: Convert to fraction form
   3,965.29/5,472.20 = 2,196.86/x
3. Step 3: Cross multiply
   3,965.29x = 5,472.20 × 2,196.86
4. Step 4: Simplify right side
   3,965.29x = 12,021,635.42
5. Step 5: Solve for x
   x = 12,021,635.42/3,965.29
6. Step 6: Final answer
   x = 3,031.72