Finding the Fourth Proportional to 3,615.83, 5,426.82 and 2,578.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.83 : 5,426.82 = 2,578.37 : x
2. Step 2: Convert to fraction form
   3,615.83/5,426.82 = 2,578.37/x
3. Step 3: Cross multiply
   3,615.83x = 5,426.82 × 2,578.37
4. Step 4: Simplify right side
   3,615.83x = 13,992,349.88
5. Step 5: Solve for x
   x = 13,992,349.88/3,615.83
6. Step 6: Final answer
   x = 3,869.75