Finding the Fourth Proportional to 3,678.09, 5,075.39 and 2,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,678.09 : 5,075.39 = 2,185.72 : x
2. Step 2: Convert to fraction form
   3,678.09/5,075.39 = 2,185.72/x
3. Step 3: Cross multiply
   3,678.09x = 5,075.39 × 2,185.72
4. Step 4: Simplify right side
   3,678.09x = 11,093,401.71
5. Step 5: Solve for x
   x = 11,093,401.71/3,678.09
6. Step 6: Final answer
   x = 3,016.07