Finding the Fourth Proportional to 8,116.78, 12,167.86 and 2,919

Step by Step Solution

1. Step 1: Write the proportion equation
   8,116.78 : 12,167.86 = 2,919 : x
2. Step 2: Convert to fraction form
   8,116.78/12,167.86 = 2,919/x
3. Step 3: Cross multiply
   8,116.78x = 12,167.86 × 2,919
4. Step 4: Simplify right side
   8,116.78x = 35,517,983.34
5. Step 5: Solve for x
   x = 35,517,983.34/8,116.78
6. Step 6: Final answer
   x = 4,375.87