Finding the Fourth Proportional to 2,086.70, 2,879.82 and 1,202.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.70 : 2,879.82 = 1,202.78 : x
2. Step 2: Convert to fraction form
   2,086.70/2,879.82 = 1,202.78/x
3. Step 3: Cross multiply
   2,086.70x = 2,879.82 × 1,202.78
4. Step 4: Simplify right side
   2,086.70x = 3,463,797.10
5. Step 5: Solve for x
   x = 3,463,797.10/2,086.70
6. Step 6: Final answer
   x = 1,659.94