Finding the Fourth Proportional to 8,158.69, 12,239.61 and 3,478.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,158.69 : 12,239.61 = 3,478.62 : x
2. Step 2: Convert to fraction form
   8,158.69/12,239.61 = 3,478.62/x
3. Step 3: Cross multiply
   8,158.69x = 12,239.61 × 3,478.62
4. Step 4: Simplify right side
   8,158.69x = 42,576,952.14
5. Step 5: Solve for x
   x = 42,576,952.14/8,158.69
6. Step 6: Final answer
   x = 5,218.60