Finding the Fourth Proportional to 3,677.09, 5,074.40 and 2,105.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,677.09 : 5,074.40 = 2,105.20 : x
2. Step 2: Convert to fraction form
   3,677.09/5,074.40 = 2,105.20/x
3. Step 3: Cross multiply
   3,677.09x = 5,074.40 × 2,105.20
4. Step 4: Simplify right side
   3,677.09x = 10,682,590.98
5. Step 5: Solve for x
   x = 10,682,590.98/3,677.09
6. Step 6: Final answer
   x = 2,905.18