Finding the Fourth Proportional to 3,947.38, 5,447.45 and 2,179.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.38 : 5,447.45 = 2,179.00 : x
2. Step 2: Convert to fraction form
   3,947.38/5,447.45 = 2,179.00/x
3. Step 3: Cross multiply
   3,947.38x = 5,447.45 × 2,179.00
4. Step 4: Simplify right side
   3,947.38x = 11,870,005.81
5. Step 5: Solve for x
   x = 11,870,005.81/3,947.38
6. Step 6: Final answer
   x = 3,007.06