Finding the Fourth Proportional to 2,390.85, 3,581.71 and 1,401.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.85 : 3,581.71 = 1,401.23 : x
2. Step 2: Convert to fraction form
   2,390.85/3,581.71 = 1,401.23/x
3. Step 3: Cross multiply
   2,390.85x = 3,581.71 × 1,401.23
4. Step 4: Simplify right side
   2,390.85x = 5,018,804.95
5. Step 5: Solve for x
   x = 5,018,804.95/2,390.85
6. Step 6: Final answer
   x = 2,099.17