Finding the Fourth Proportional to 9,171.56, 12,656.81 and 5,394.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.56 : 12,656.81 = 5,394.89 : x
2. Step 2: Convert to fraction form
   9,171.56/12,656.81 = 5,394.89/x
3. Step 3: Cross multiply
   9,171.56x = 12,656.81 × 5,394.89
4. Step 4: Simplify right side
   9,171.56x = 68,282,007.44
5. Step 5: Solve for x
   x = 68,282,007.44/9,171.56
6. Step 6: Final answer
   x = 7,444.98