Finding the Fourth Proportional to 4,111.69, 6,167.52 and 1,919.20

Step by Step Solution

1. Step 1: Write the proportion equation
   4,111.69 : 6,167.52 = 1,919.20 : x
2. Step 2: Convert to fraction form
   4,111.69/6,167.52 = 1,919.20/x
3. Step 3: Cross multiply
   4,111.69x = 6,167.52 × 1,919.20
4. Step 4: Simplify right side
   4,111.69x = 11,836,704.38
5. Step 5: Solve for x
   x = 11,836,704.38/4,111.69
6. Step 6: Final answer
   x = 2,878.79