Finding the Fourth Proportional to 2,607.69, 3,911.58 and 852.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.69 : 3,911.58 = 852.71 : x
2. Step 2: Convert to fraction form
   2,607.69/3,911.58 = 852.71/x
3. Step 3: Cross multiply
   2,607.69x = 3,911.58 × 852.71
4. Step 4: Simplify right side
   2,607.69x = 3,335,443.38
5. Step 5: Solve for x
   x = 3,335,443.38/2,607.69
6. Step 6: Final answer
   x = 1,279.08