Finding the Fourth Proportional to 2,627.82, 3,940.70 and 2,109.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.82 : 3,940.70 = 2,109.09 : x
2. Step 2: Convert to fraction form
   2,627.82/3,940.70 = 2,109.09/x
3. Step 3: Cross multiply
   2,627.82x = 3,940.70 × 2,109.09
4. Step 4: Simplify right side
   2,627.82x = 8,311,284.89
5. Step 5: Solve for x
   x = 8,311,284.89/2,627.82
6. Step 6: Final answer
   x = 3,162.81