Finding the Fourth Proportional to 9,947.92, 13,728.06 and 5,471.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.92 : 13,728.06 = 5,471.56 : x
2. Step 2: Convert to fraction form
   9,947.92/13,728.06 = 5,471.56/x
3. Step 3: Cross multiply
   9,947.92x = 13,728.06 × 5,471.56
4. Step 4: Simplify right side
   9,947.92x = 75,113,903.97
5. Step 5: Solve for x
   x = 75,113,903.97/9,947.92
6. Step 6: Final answer
   x = 7,550.71