Finding the Fourth Proportional to 9,947.98, 13,728.02 and 5,471.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.98 : 13,728.02 = 5,471.70 : x
2. Step 2: Convert to fraction form
   9,947.98/13,728.02 = 5,471.70/x
3. Step 3: Cross multiply
   9,947.98x = 13,728.02 × 5,471.70
4. Step 4: Simplify right side
   9,947.98x = 75,115,607.03
5. Step 5: Solve for x
   x = 75,115,607.03/9,947.98
6. Step 6: Final answer
   x = 7,550.84