Finding the Fourth Proportional to 8,111.34, 12,158.10 and 3,180.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.34 : 12,158.10 = 3,180.06 : x
2. Step 2: Convert to fraction form
   8,111.34/12,158.10 = 3,180.06/x
3. Step 3: Cross multiply
   8,111.34x = 12,158.10 × 3,180.06
4. Step 4: Simplify right side
   8,111.34x = 38,663,487.49
5. Step 5: Solve for x
   x = 38,663,487.49/8,111.34
6. Step 6: Final answer
   x = 4,766.60