Finding the Fourth Proportional to 9,947.28, 13,727.57 and 5,471.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.28 : 13,727.57 = 5,471.36 : x
2. Step 2: Convert to fraction form
   9,947.28/13,727.57 = 5,471.36/x
3. Step 3: Cross multiply
   9,947.28x = 13,727.57 × 5,471.36
4. Step 4: Simplify right side
   9,947.28x = 75,108,477.40
5. Step 5: Solve for x
   x = 75,108,477.40/9,947.28
6. Step 6: Final answer
   x = 7,550.65