Finding the Fourth Proportional to 2,057.97, 3,086.49 and 808.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.97 : 3,086.49 = 808.47 : x
2. Step 2: Convert to fraction form
   2,057.97/3,086.49 = 808.47/x
3. Step 3: Cross multiply
   2,057.97x = 3,086.49 × 808.47
4. Step 4: Simplify right side
   2,057.97x = 2,495,334.57
5. Step 5: Solve for x
   x = 2,495,334.57/2,057.97
6. Step 6: Final answer
   x = 1,212.52