Finding the Fourth Proportional to 2,654.39, 3,981.71 and 805.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,654.39 : 3,981.71 = 805.77 : x
2. Step 2: Convert to fraction form
   2,654.39/3,981.71 = 805.77/x
3. Step 3: Cross multiply
   2,654.39x = 3,981.71 × 805.77
4. Step 4: Simplify right side
   2,654.39x = 3,208,342.47
5. Step 5: Solve for x
   x = 3,208,342.47/2,654.39
6. Step 6: Final answer
   x = 1,208.69