Finding the Fourth Proportional to 8,116.72, 12,177.36 and 3,118.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,116.72 : 12,177.36 = 3,118.48 : x
2. Step 2: Convert to fraction form
   8,116.72/12,177.36 = 3,118.48/x
3. Step 3: Cross multiply
   8,116.72x = 12,177.36 × 3,118.48
4. Step 4: Simplify right side
   8,116.72x = 37,974,853.61
5. Step 5: Solve for x
   x = 37,974,853.61/8,116.72
6. Step 6: Final answer
   x = 4,678.60