Finding the Fourth Proportional to 2,015.82, 2,780.78 and 1,268.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.82 : 2,780.78 = 1,268.37 : x
2. Step 2: Convert to fraction form
   2,015.82/2,780.78 = 1,268.37/x
3. Step 3: Cross multiply
   2,015.82x = 2,780.78 × 1,268.37
4. Step 4: Simplify right side
   2,015.82x = 3,527,057.93
5. Step 5: Solve for x
   x = 3,527,057.93/2,015.82
6. Step 6: Final answer
   x = 1,749.69