Finding the Fourth Proportional to 2,818.89, 4,228.88 and 1,087.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,818.89 : 4,228.88 = 1,087.38 : x
2. Step 2: Convert to fraction form
   2,818.89/4,228.88 = 1,087.38/x
3. Step 3: Cross multiply
   2,818.89x = 4,228.88 × 1,087.38
4. Step 4: Simplify right side
   2,818.89x = 4,598,399.53
5. Step 5: Solve for x
   x = 4,598,399.53/2,818.89
6. Step 6: Final answer
   x = 1,631.28