Finding the Fourth Proportional to 2,654.16, 3,981.81 and 805.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,654.16 : 3,981.81 = 805.41 : x
2. Step 2: Convert to fraction form
   2,654.16/3,981.81 = 805.41/x
3. Step 3: Cross multiply
   2,654.16x = 3,981.81 × 805.41
4. Step 4: Simplify right side
   2,654.16x = 3,206,989.59
5. Step 5: Solve for x
   x = 3,206,989.59/2,654.16
6. Step 6: Final answer
   x = 1,208.29