Finding the Fourth Proportional to 3,360.35, 5,038.71 and 2,578.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,360.35 : 5,038.71 = 2,578.42 : x
2. Step 2: Convert to fraction form
   3,360.35/5,038.71 = 2,578.42/x
3. Step 3: Cross multiply
   3,360.35x = 5,038.71 × 2,578.42
4. Step 4: Simplify right side
   3,360.35x = 12,991,885.44
5. Step 5: Solve for x
   x = 12,991,885.44/3,360.35
6. Step 6: Final answer
   x = 3,866.23