Finding the Fourth Proportional to 2,683.41, 4,002.83 and 2,638.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,683.41 : 4,002.83 = 2,638.86 : x
2. Step 2: Convert to fraction form
   2,683.41/4,002.83 = 2,638.86/x
3. Step 3: Cross multiply
   2,683.41x = 4,002.83 × 2,638.86
4. Step 4: Simplify right side
   2,683.41x = 10,562,894.78
5. Step 5: Solve for x
   x = 10,562,894.78/2,683.41
6. Step 6: Final answer
   x = 3,936.37