Finding the Fourth Proportional to 3,947.49, 5,447.75 and 2,269.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.49 : 5,447.75 = 2,269.47 : x
2. Step 2: Convert to fraction form
   3,947.49/5,447.75 = 2,269.47/x
3. Step 3: Cross multiply
   3,947.49x = 5,447.75 × 2,269.47
4. Step 4: Simplify right side
   3,947.49x = 12,363,474.69
5. Step 5: Solve for x
   x = 12,363,474.69/3,947.49
6. Step 6: Final answer
   x = 3,131.98