Finding the Fourth Proportional to 3,947.82, 5,447.80 and 2,179.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.82 : 5,447.80 = 2,179.32 : x
2. Step 2: Convert to fraction form
   3,947.82/5,447.80 = 2,179.32/x
3. Step 3: Cross multiply
   3,947.82x = 5,447.80 × 2,179.32
4. Step 4: Simplify right side
   3,947.82x = 11,872,499.50
5. Step 5: Solve for x
   x = 11,872,499.50/3,947.82
6. Step 6: Final answer
   x = 3,007.36