Finding the Fourth Proportional to 2,886.09, 4,328.70 and 805.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,886.09 : 4,328.70 = 805.89 : x
2. Step 2: Convert to fraction form
   2,886.09/4,328.70 = 805.89/x
3. Step 3: Cross multiply
   2,886.09x = 4,328.70 × 805.89
4. Step 4: Simplify right side
   2,886.09x = 3,488,456.04
5. Step 5: Solve for x
   x = 3,488,456.04/2,886.09
6. Step 6: Final answer
   x = 1,208.71