Finding the Fourth Proportional to 2,401.88, 3,578.95 and 2,139.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,401.88 : 3,578.95 = 2,139.87 : x
2. Step 2: Convert to fraction form
   2,401.88/3,578.95 = 2,139.87/x
3. Step 3: Cross multiply
   2,401.88x = 3,578.95 × 2,139.87
4. Step 4: Simplify right side
   2,401.88x = 7,658,481.05
5. Step 5: Solve for x
   x = 7,658,481.05/2,401.88
6. Step 6: Final answer
   x = 3,188.53