Finding the Fourth Proportional to 2,678.82, 4,015.56 and 1,291.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.82 : 4,015.56 = 1,291.77 : x
2. Step 2: Convert to fraction form
   2,678.82/4,015.56 = 1,291.77/x
3. Step 3: Cross multiply
   2,678.82x = 4,015.56 × 1,291.77
4. Step 4: Simplify right side
   2,678.82x = 5,187,179.94
5. Step 5: Solve for x
   x = 5,187,179.94/2,678.82
6. Step 6: Final answer
   x = 1,936.37