Finding the Fourth Proportional to 2,787.66, 3,843.78 and 2,618.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.66 : 3,843.78 = 2,618.16 : x
2. Step 2: Convert to fraction form
   2,787.66/3,843.78 = 2,618.16/x
3. Step 3: Cross multiply
   2,787.66x = 3,843.78 × 2,618.16
4. Step 4: Simplify right side
   2,787.66x = 10,063,631.04
5. Step 5: Solve for x
   x = 10,063,631.04/2,787.66
6. Step 6: Final answer
   x = 3,610.06