Finding the Fourth Proportional to 2,118.22, 3,179.27 and 1,078.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.22 : 3,179.27 = 1,078.94 : x
2. Step 2: Convert to fraction form
   2,118.22/3,179.27 = 1,078.94/x
3. Step 3: Cross multiply
   2,118.22x = 3,179.27 × 1,078.94
4. Step 4: Simplify right side
   2,118.22x = 3,430,228.27
5. Step 5: Solve for x
   x = 3,430,228.27/2,118.22
6. Step 6: Final answer
   x = 1,619.39