Finding the Fourth Proportional to 8,112.45, 12,167.55 and 3,185.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.45 : 12,167.55 = 3,185.55 : x
2. Step 2: Convert to fraction form
   8,112.45/12,167.55 = 3,185.55/x
3. Step 3: Cross multiply
   8,112.45x = 12,167.55 × 3,185.55
4. Step 4: Simplify right side
   8,112.45x = 38,760,338.90
5. Step 5: Solve for x
   x = 38,760,338.90/8,112.45
6. Step 6: Final answer
   x = 4,777.88