Finding the Fourth Proportional to 2,714.66, 4,072.61 and 865.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,714.66 : 4,072.61 = 865.89 : x
2. Step 2: Convert to fraction form
   2,714.66/4,072.61 = 865.89/x
3. Step 3: Cross multiply
   2,714.66x = 4,072.61 × 865.89
4. Step 4: Simplify right side
   2,714.66x = 3,526,407.58
5. Step 5: Solve for x
   x = 3,526,407.58/2,714.66
6. Step 6: Final answer
   x = 1,299.02