Finding the Fourth Proportional to 5,625.69, 7,766.78 and 3,859.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,625.69 : 7,766.78 = 3,859.89 : x
2. Step 2: Convert to fraction form
   5,625.69/7,766.78 = 3,859.89/x
3. Step 3: Cross multiply
   5,625.69x = 7,766.78 × 3,859.89
4. Step 4: Simplify right side
   5,625.69x = 29,978,916.45
5. Step 5: Solve for x
   x = 29,978,916.45/5,625.69
6. Step 6: Final answer
   x = 5,328.93