Finding the Fourth Proportional to 2,783.92, 4,159.55 and 2,687.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.92 : 4,159.55 = 2,687.05 : x
2. Step 2: Convert to fraction form
   2,783.92/4,159.55 = 2,687.05/x
3. Step 3: Cross multiply
   2,783.92x = 4,159.55 × 2,687.05
4. Step 4: Simplify right side
   2,783.92x = 11,176,918.83
5. Step 5: Solve for x
   x = 11,176,918.83/2,783.92
6. Step 6: Final answer
   x = 4,014.81