Finding the Fourth Proportional to 3,908.32, 5,392.56 and 2,858.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908.32 : 5,392.56 = 2,858.56 : x
2. Step 2: Convert to fraction form
   3,908.32/5,392.56 = 2,858.56/x
3. Step 3: Cross multiply
   3,908.32x = 5,392.56 × 2,858.56
4. Step 4: Simplify right side
   3,908.32x = 15,414,956.31
5. Step 5: Solve for x
   x = 15,414,956.31/3,908.32
6. Step 6: Final answer
   x = 3,944.14