Finding the Fourth Proportional to 3,947.83, 5,448.06 and 2,179.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.83 : 5,448.06 = 2,179.40 : x
2. Step 2: Convert to fraction form
   3,947.83/5,448.06 = 2,179.40/x
3. Step 3: Cross multiply
   3,947.83x = 5,448.06 × 2,179.40
4. Step 4: Simplify right side
   3,947.83x = 11,873,474.72
5. Step 5: Solve for x
   x = 11,873,474.72/3,947.83
6. Step 6: Final answer
   x = 3,007.60