Finding the Fourth Proportional to 8,936.16, 12,331.89 and 5,398.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,936.16 : 12,331.89 = 5,398.71 : x
2. Step 2: Convert to fraction form
   8,936.16/12,331.89 = 5,398.71/x
3. Step 3: Cross multiply
   8,936.16x = 12,331.89 × 5,398.71
4. Step 4: Simplify right side
   8,936.16x = 66,576,297.86
5. Step 5: Solve for x
   x = 66,576,297.86/8,936.16
6. Step 6: Final answer
   x = 7,450.21