Finding the Fourth Proportional to 3,966.72, 5,474.56 and 2,288.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,966.72 : 5,474.56 = 2,288.12 : x
2. Step 2: Convert to fraction form
   3,966.72/5,474.56 = 2,288.12/x
3. Step 3: Cross multiply
   3,966.72x = 5,474.56 × 2,288.12
4. Step 4: Simplify right side
   3,966.72x = 12,526,450.23
5. Step 5: Solve for x
   x = 12,526,450.23/3,966.72
6. Step 6: Final answer
   x = 3,157.89