Finding the Fourth Proportional to 2,818.08, 4,227.72 and 1,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,818.08 : 4,227.72 = 1,086.72 : x
2. Step 2: Convert to fraction form
   2,818.08/4,227.72 = 1,086.72/x
3. Step 3: Cross multiply
   2,818.08x = 4,227.72 × 1,086.72
4. Step 4: Simplify right side
   2,818.08x = 4,594,347.88
5. Step 5: Solve for x
   x = 4,594,347.88/2,818.08
6. Step 6: Final answer
   x = 1,630.31