Finding the Fourth Proportional to 3,558.16, 4,908.56 and 2,231.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558.16 : 4,908.56 = 2,231.20 : x
2. Step 2: Convert to fraction form
   3,558.16/4,908.56 = 2,231.20/x
3. Step 3: Cross multiply
   3,558.16x = 4,908.56 × 2,231.20
4. Step 4: Simplify right side
   3,558.16x = 10,951,979.07
5. Step 5: Solve for x
   x = 10,951,979.07/3,558.16
6. Step 6: Final answer
   x = 3,077.99