Finding the Fourth Proportional to 8,118.06, 12,168.78 and 3,180.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.06 : 12,168.78 = 3,180.98 : x
2. Step 2: Convert to fraction form
   8,118.06/12,168.78 = 3,180.98/x
3. Step 3: Cross multiply
   8,118.06x = 12,168.78 × 3,180.98
4. Step 4: Simplify right side
   8,118.06x = 38,708,645.80
5. Step 5: Solve for x
   x = 38,708,645.80/8,118.06
6. Step 6: Final answer
   x = 4,768.21