Finding the Fourth Proportional to 9,947.16, 13,726.84 and 5,471.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.16 : 13,726.84 = 5,471.40 : x
2. Step 2: Convert to fraction form
   9,947.16/13,726.84 = 5,471.40/x
3. Step 3: Cross multiply
   9,947.16x = 13,726.84 × 5,471.40
4. Step 4: Simplify right side
   9,947.16x = 75,105,032.38
5. Step 5: Solve for x
   x = 75,105,032.38/9,947.16
6. Step 6: Final answer
   x = 7,550.40