Finding the Fourth Proportional to 3,510.78, 4,844.55 and 2,018.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,510.78 : 4,844.55 = 2,018.55 : x
2. Step 2: Convert to fraction form
   3,510.78/4,844.55 = 2,018.55/x
3. Step 3: Cross multiply
   3,510.78x = 4,844.55 × 2,018.55
4. Step 4: Simplify right side
   3,510.78x = 9,778,966.40
5. Step 5: Solve for x
   x = 9,778,966.40/3,510.78
6. Step 6: Final answer
   x = 2,785.41