Finding the Fourth Proportional to 2,401.82, 3,578.86 and 2,139.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,401.82 : 3,578.86 = 2,139.81 : x
2. Step 2: Convert to fraction form
   2,401.82/3,578.86 = 2,139.81/x
3. Step 3: Cross multiply
   2,401.82x = 3,578.86 × 2,139.81
4. Step 4: Simplify right side
   2,401.82x = 7,658,084.89
5. Step 5: Solve for x
   x = 7,658,084.89/2,401.82
6. Step 6: Final answer
   x = 3,188.45