Finding the Fourth Proportional to 2,638.69, 3,956.71 and 883.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.69 : 3,956.71 = 883.09 : x
2. Step 2: Convert to fraction form
   2,638.69/3,956.71 = 883.09/x
3. Step 3: Cross multiply
   2,638.69x = 3,956.71 × 883.09
4. Step 4: Simplify right side
   2,638.69x = 3,494,131.03
5. Step 5: Solve for x
   x = 3,494,131.03/2,638.69
6. Step 6: Final answer
   x = 1,324.19