Finding the Fourth Proportional to 2,581.56, 3,872.94 and 850.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.56 : 3,872.94 = 850.12 : x
2. Step 2: Convert to fraction form
   2,581.56/3,872.94 = 850.12/x
3. Step 3: Cross multiply
   2,581.56x = 3,872.94 × 850.12
4. Step 4: Simplify right side
   2,581.56x = 3,292,463.75
5. Step 5: Solve for x
   x = 3,292,463.75/2,581.56
6. Step 6: Final answer
   x = 1,275.38