Finding the Fourth Proportional to 2,452.72, 3,676.62 and 891.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.72 : 3,676.62 = 891.40 : x
2. Step 2: Convert to fraction form
   2,452.72/3,676.62 = 891.40/x
3. Step 3: Cross multiply
   2,452.72x = 3,676.62 × 891.40
4. Step 4: Simplify right side
   2,452.72x = 3,277,339.07
5. Step 5: Solve for x
   x = 3,277,339.07/2,452.72
6. Step 6: Final answer
   x = 1,336.21