Finding the Fourth Proportional to 2,288.78, 3,155.46 and 1,818.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.78 : 3,155.46 = 1,818.24 : x
2. Step 2: Convert to fraction form
   2,288.78/3,155.46 = 1,818.24/x
3. Step 3: Cross multiply
   2,288.78x = 3,155.46 × 1,818.24
4. Step 4: Simplify right side
   2,288.78x = 5,737,388.14
5. Step 5: Solve for x
   x = 5,737,388.14/2,288.78
6. Step 6: Final answer
   x = 2,506.74