Finding the Fourth Proportional to 8,103.69, 12,157.17 and 3,105.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,103.69 : 12,157.17 = 3,105.70 : x
2. Step 2: Convert to fraction form
   8,103.69/12,157.17 = 3,105.70/x
3. Step 3: Cross multiply
   8,103.69x = 12,157.17 × 3,105.70
4. Step 4: Simplify right side
   8,103.69x = 37,756,522.87
5. Step 5: Solve for x
   x = 37,756,522.87/8,103.69
6. Step 6: Final answer
   x = 4,659.18