Finding the Fourth Proportional to 8,185.62, 12,285.72 and 3,805.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,185.62 : 12,285.72 = 3,805.55 : x
2. Step 2: Convert to fraction form
   8,185.62/12,285.72 = 3,805.55/x
3. Step 3: Cross multiply
   8,185.62x = 12,285.72 × 3,805.55
4. Step 4: Simplify right side
   8,185.62x = 46,753,841.29
5. Step 5: Solve for x
   x = 46,753,841.29/8,185.62
6. Step 6: Final answer
   x = 5,711.70