Finding the Fourth Proportional to 2,679.08, 4,019.31 and 1,118.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,679.08 : 4,019.31 = 1,118.57 : x
2. Step 2: Convert to fraction form
   2,679.08/4,019.31 = 1,118.57/x
3. Step 3: Cross multiply
   2,679.08x = 4,019.31 × 1,118.57
4. Step 4: Simplify right side
   2,679.08x = 4,495,879.59
5. Step 5: Solve for x
   x = 4,495,879.59/2,679.08
6. Step 6: Final answer
   x = 1,678.14