Finding the Fourth Proportional to 2,057.91, 3,086.55 and 671.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.91 : 3,086.55 = 671.24 : x
2. Step 2: Convert to fraction form
   2,057.91/3,086.55 = 671.24/x
3. Step 3: Cross multiply
   2,057.91x = 3,086.55 × 671.24
4. Step 4: Simplify right side
   2,057.91x = 2,071,811.71
5. Step 5: Solve for x
   x = 2,071,811.71/2,057.91
6. Step 6: Final answer
   x = 1,006.76