Finding the Fourth Proportional to 2,086.85, 2,879.60 and 1,202.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.85 : 2,879.60 = 1,202.60 : x
2. Step 2: Convert to fraction form
   2,086.85/2,879.60 = 1,202.60/x
3. Step 3: Cross multiply
   2,086.85x = 2,879.60 × 1,202.60
4. Step 4: Simplify right side
   2,086.85x = 3,462,986.55
5. Step 5: Solve for x
   x = 3,462,986.55/2,086.85
6. Step 6: Final answer
   x = 1,659.44