Finding the Fourth Proportional to 2,399.67, 3,578.46 and 2,377.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.67 : 3,578.46 = 2,377.77 : x
2. Step 2: Convert to fraction form
   2,399.67/3,578.46 = 2,377.77/x
3. Step 3: Cross multiply
   2,399.67x = 3,578.46 × 2,377.77
4. Step 4: Simplify right side
   2,399.67x = 8,508,754.83
5. Step 5: Solve for x
   x = 8,508,754.83/2,399.67
6. Step 6: Final answer
   x = 3,545.80