Finding the Fourth Proportional to 8,109.55, 12,167.49 and 3,178.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,109.55 : 12,167.49 = 3,178.33 : x
2. Step 2: Convert to fraction form
   8,109.55/12,167.49 = 3,178.33/x
3. Step 3: Cross multiply
   8,109.55x = 12,167.49 × 3,178.33
4. Step 4: Simplify right side
   8,109.55x = 38,672,298.49
5. Step 5: Solve for x
   x = 38,672,298.49/8,109.55
6. Step 6: Final answer
   x = 4,768.74