Finding the Fourth Proportional to 2,679.28, 4,019.55 and 1,118.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,679.28 : 4,019.55 = 1,118.41 : x
2. Step 2: Convert to fraction form
   2,679.28/4,019.55 = 1,118.41/x
3. Step 3: Cross multiply
   2,679.28x = 4,019.55 × 1,118.41
4. Step 4: Simplify right side
   2,679.28x = 4,495,484.82
5. Step 5: Solve for x
   x = 4,495,484.82/2,679.28
6. Step 6: Final answer
   x = 1,677.87