Finding the Fourth Proportional to 3,965.72, 5,473.46 and 2,288.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.72 : 5,473.46 = 2,288.21 : x
2. Step 2: Convert to fraction form
   3,965.72/5,473.46 = 2,288.21/x
3. Step 3: Cross multiply
   3,965.72x = 5,473.46 × 2,288.21
4. Step 4: Simplify right side
   3,965.72x = 12,524,445.31
5. Step 5: Solve for x
   x = 12,524,445.31/3,965.72
6. Step 6: Final answer
   x = 3,158.17