Finding the Fourth Proportional to 2,405.86, 3,608.82 and 1,919.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.86 : 3,608.82 = 1,919.86 : x
2. Step 2: Convert to fraction form
   2,405.86/3,608.82 = 1,919.86/x
3. Step 3: Cross multiply
   2,405.86x = 3,608.82 × 1,919.86
4. Step 4: Simplify right side
   2,405.86x = 6,928,429.17
5. Step 5: Solve for x
   x = 6,928,429.17/2,405.86
6. Step 6: Final answer
   x = 2,879.81