Finding the Fourth Proportional to 2,059.60, 3,086.67 and 1,086.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.60 : 3,086.67 = 1,086.39 : x
2. Step 2: Convert to fraction form
   2,059.60/3,086.67 = 1,086.39/x
3. Step 3: Cross multiply
   2,059.60x = 3,086.67 × 1,086.39
4. Step 4: Simplify right side
   2,059.60x = 3,353,327.42
5. Step 5: Solve for x
   x = 3,353,327.42/2,059.60
6. Step 6: Final answer
   x = 1,628.14