Finding the Fourth Proportional to 2,581.71, 3,872.52 and 850.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.71 : 3,872.52 = 850.35 : x
2. Step 2: Convert to fraction form
   2,581.71/3,872.52 = 850.35/x
3. Step 3: Cross multiply
   2,581.71x = 3,872.52 × 850.35
4. Step 4: Simplify right side
   2,581.71x = 3,292,997.38
5. Step 5: Solve for x
   x = 3,292,997.38/2,581.71
6. Step 6: Final answer
   x = 1,275.51