Finding the Fourth Proportional to 2,581.22, 3,872.40 and 849.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.22 : 3,872.40 = 849.86 : x
2. Step 2: Convert to fraction form
   2,581.22/3,872.40 = 849.86/x
3. Step 3: Cross multiply
   2,581.22x = 3,872.40 × 849.86
4. Step 4: Simplify right side
   2,581.22x = 3,290,997.86
5. Step 5: Solve for x
   x = 3,290,997.86/2,581.22
6. Step 6: Final answer
   x = 1,274.98