Finding the Fourth Proportional to 3,965.79, 5,472.43 and 2,196.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.79 : 5,472.43 = 2,196.93 : x
2. Step 2: Convert to fraction form
   3,965.79/5,472.43 = 2,196.93/x
3. Step 3: Cross multiply
   3,965.79x = 5,472.43 × 2,196.93
4. Step 4: Simplify right side
   3,965.79x = 12,022,545.64
5. Step 5: Solve for x
   x = 12,022,545.64/3,965.79
6. Step 6: Final answer
   x = 3,031.56