Finding the Fourth Proportional to 2,451.91, 3,676.71 and 890.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.91 : 3,676.71 = 890.81 : x
2. Step 2: Convert to fraction form
   2,451.91/3,676.71 = 890.81/x
3. Step 3: Cross multiply
   2,451.91x = 3,676.71 × 890.81
4. Step 4: Simplify right side
   2,451.91x = 3,275,255.89
5. Step 5: Solve for x
   x = 3,275,255.89/2,451.91
6. Step 6: Final answer
   x = 1,335.80