Finding the Fourth Proportional to 9,171.34, 13,754.16 and 3,906.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.34 : 13,754.16 = 3,906.28 : x
2. Step 2: Convert to fraction form
   9,171.34/13,754.16 = 3,906.28/x
3. Step 3: Cross multiply
   9,171.34x = 13,754.16 × 3,906.28
4. Step 4: Simplify right side
   9,171.34x = 53,727,600.12
5. Step 5: Solve for x
   x = 53,727,600.12/9,171.34
6. Step 6: Final answer
   x = 5,858.21