Finding the Fourth Proportional to 2,209.82, 3,049.55 and 1,215.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.82 : 3,049.55 = 1,215.09 : x
2. Step 2: Convert to fraction form
   2,209.82/3,049.55 = 1,215.09/x
3. Step 3: Cross multiply
   2,209.82x = 3,049.55 × 1,215.09
4. Step 4: Simplify right side
   2,209.82x = 3,705,471.63
5. Step 5: Solve for x
   x = 3,705,471.63/2,209.82
6. Step 6: Final answer
   x = 1,676.82