Finding the Fourth Proportional to 8,947.82, 12,349.81 and 5,171.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,947.82 : 12,349.81 = 5,171.15 : x
2. Step 2: Convert to fraction form
   8,947.82/12,349.81 = 5,171.15/x
3. Step 3: Cross multiply
   8,947.82x = 12,349.81 × 5,171.15
4. Step 4: Simplify right side
   8,947.82x = 63,862,673.31
5. Step 5: Solve for x
   x = 63,862,673.31/8,947.82
6. Step 6: Final answer
   x = 7,137.23