Finding the Fourth Proportional to 2,057.82, 3,086.31 and 670.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.82 : 3,086.31 = 670.80 : x
2. Step 2: Convert to fraction form
   2,057.82/3,086.31 = 670.80/x
3. Step 3: Cross multiply
   2,057.82x = 3,086.31 × 670.80
4. Step 4: Simplify right side
   2,057.82x = 2,070,296.75
5. Step 5: Solve for x
   x = 2,070,296.75/2,057.82
6. Step 6: Final answer
   x = 1,006.06