Finding the Fourth Proportional to 2,396.90, 3,574.18 and 2,105.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,396.90 : 3,574.18 = 2,105.60 : x
2. Step 2: Convert to fraction form
   2,396.90/3,574.18 = 2,105.60/x
3. Step 3: Cross multiply
   2,396.90x = 3,574.18 × 2,105.60
4. Step 4: Simplify right side
   2,396.90x = 7,525,775.54
5. Step 5: Solve for x
   x = 7,525,775.54/2,396.90
6. Step 6: Final answer
   x = 3,139.80