Finding the Fourth Proportional to 2,057.15, 3,086.25 and 670.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.15 : 3,086.25 = 670.58 : x
2. Step 2: Convert to fraction form
   2,057.15/3,086.25 = 670.58/x
3. Step 3: Cross multiply
   2,057.15x = 3,086.25 × 670.58
4. Step 4: Simplify right side
   2,057.15x = 2,069,574.92
5. Step 5: Solve for x
   x = 2,069,574.92/2,057.15
6. Step 6: Final answer
   x = 1,006.04