Finding the Fourth Proportional to 2,581.75, 3,872.72 and 850.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.75 : 3,872.72 = 850.51 : x
2. Step 2: Convert to fraction form
   2,581.75/3,872.72 = 850.51/x
3. Step 3: Cross multiply
   2,581.75x = 3,872.72 × 850.51
4. Step 4: Simplify right side
   2,581.75x = 3,293,787.09
5. Step 5: Solve for x
   x = 3,293,787.09/2,581.75
6. Step 6: Final answer
   x = 1,275.80