Finding the Fourth Proportional to 9,363.57, 12,921.81 and 5,171.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,363.57 : 12,921.81 = 5,171.82 : x
2. Step 2: Convert to fraction form
   9,363.57/12,921.81 = 5,171.82/x
3. Step 3: Cross multiply
   9,363.57x = 12,921.81 × 5,171.82
4. Step 4: Simplify right side
   9,363.57x = 66,829,275.39
5. Step 5: Solve for x
   x = 66,829,275.39/9,363.57
6. Step 6: Final answer
   x = 7,137.16