Finding the Fourth Proportional to 2,778.18, 4,168.37 and 1,217.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.18 : 4,168.37 = 1,217.35 : x
2. Step 2: Convert to fraction form
   2,778.18/4,168.37 = 1,217.35/x
3. Step 3: Cross multiply
   2,778.18x = 4,168.37 × 1,217.35
4. Step 4: Simplify right side
   2,778.18x = 5,074,365.22
5. Step 5: Solve for x
   x = 5,074,365.22/2,778.18
6. Step 6: Final answer
   x = 1,826.51