Finding the Fourth Proportional to 3,947.99, 5,447.00 and 2,268.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.99 : 5,447.00 = 2,268.78 : x
2. Step 2: Convert to fraction form
   3,947.99/5,447.00 = 2,268.78/x
3. Step 3: Cross multiply
   3,947.99x = 5,447.00 × 2,268.78
4. Step 4: Simplify right side
   3,947.99x = 12,358,063.10
5. Step 5: Solve for x
   x = 12,358,063.10/3,947.99
6. Step 6: Final answer
   x = 3,130.22