Finding the Fourth Proportional to 2,785.86, 4,176.62 and 1,379.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.86 : 4,176.62 = 1,379.31 : x
2. Step 2: Convert to fraction form
   2,785.86/4,176.62 = 1,379.31/x
3. Step 3: Cross multiply
   2,785.86x = 4,176.62 × 1,379.31
4. Step 4: Simplify right side
   2,785.86x = 5,760,843.29
5. Step 5: Solve for x
   x = 5,760,843.29/2,785.86
6. Step 6: Final answer
   x = 2,067.89