Finding the Fourth Proportional to 3,976.28, 5,958.78 and 2,928.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.28 : 5,958.78 = 2,928.06 : x
2. Step 2: Convert to fraction form
   3,976.28/5,958.78 = 2,928.06/x
3. Step 3: Cross multiply
   3,976.28x = 5,958.78 × 2,928.06
4. Step 4: Simplify right side
   3,976.28x = 17,447,654.39
5. Step 5: Solve for x
   x = 17,447,654.39/3,976.28
6. Step 6: Final answer
   x = 4,387.94