Finding the Fourth Proportional to 2,015.06, 2,781.40 and 1,268.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.06 : 2,781.40 = 1,268.78 : x
2. Step 2: Convert to fraction form
   2,015.06/2,781.40 = 1,268.78/x
3. Step 3: Cross multiply
   2,015.06x = 2,781.40 × 1,268.78
4. Step 4: Simplify right side
   2,015.06x = 3,528,984.69
5. Step 5: Solve for x
   x = 3,528,984.69/2,015.06
6. Step 6: Final answer
   x = 1,751.31