Finding the Fourth Proportional to 2,039.83, 3,057.56 and 806.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.83 : 3,057.56 = 806.70 : x
2. Step 2: Convert to fraction form
   2,039.83/3,057.56 = 806.70/x
3. Step 3: Cross multiply
   2,039.83x = 3,057.56 × 806.70
4. Step 4: Simplify right side
   2,039.83x = 2,466,529.62
5. Step 5: Solve for x
   x = 2,466,529.62/2,039.83
6. Step 6: Final answer
   x = 1,209.19