Finding the Fourth Proportional to 2,057.82, 3,086.73 and 518.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.82 : 3,086.73 = 518.82 : x
2. Step 2: Convert to fraction form
   2,057.82/3,086.73 = 518.82/x
3. Step 3: Cross multiply
   2,057.82x = 3,086.73 × 518.82
4. Step 4: Simplify right side
   2,057.82x = 1,601,457.26
5. Step 5: Solve for x
   x = 1,601,457.26/2,057.82
6. Step 6: Final answer
   x = 778.23