Finding the Fourth Proportional to 8,142.66, 12,204.63 and 3,455.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,142.66 : 12,204.63 = 3,455.73 : x
2. Step 2: Convert to fraction form
   8,142.66/12,204.63 = 3,455.73/x
3. Step 3: Cross multiply
   8,142.66x = 12,204.63 × 3,455.73
4. Step 4: Simplify right side
   8,142.66x = 42,175,906.03
5. Step 5: Solve for x
   x = 42,175,906.03/8,142.66
6. Step 6: Final answer
   x = 5,179.62