Finding the Fourth Proportional to 9,357.62, 12,915.69 and 6,171.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,357.62 : 12,915.69 = 6,171.49 : x
2. Step 2: Convert to fraction form
   9,357.62/12,915.69 = 6,171.49/x
3. Step 3: Cross multiply
   9,357.62x = 12,915.69 × 6,171.49
4. Step 4: Simplify right side
   9,357.62x = 79,709,020.82
5. Step 5: Solve for x
   x = 79,709,020.82/9,357.62
6. Step 6: Final answer
   x = 8,518.09