Finding the Fourth Proportional to 3,965.32, 5,472.16 and 2,196.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.32 : 5,472.16 = 2,196.89 : x
2. Step 2: Convert to fraction form
   3,965.32/5,472.16 = 2,196.89/x
3. Step 3: Cross multiply
   3,965.32x = 5,472.16 × 2,196.89
4. Step 4: Simplify right side
   3,965.32x = 12,021,733.58
5. Step 5: Solve for x
   x = 12,021,733.58/3,965.32
6. Step 6: Final answer
   x = 3,031.72