Finding the Fourth Proportional to 3,965.72, 5,473.18 and 2,287.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,965.72 : 5,473.18 = 2,287.12 : x
2. Step 2: Convert to fraction form
   3,965.72/5,473.18 = 2,287.12/x
3. Step 3: Cross multiply
   3,965.72x = 5,473.18 × 2,287.12
4. Step 4: Simplify right side
   3,965.72x = 12,517,821.69
5. Step 5: Solve for x
   x = 12,517,821.69/3,965.72
6. Step 6: Final answer
   x = 3,156.51