Finding the Fourth Proportional to 2,209.83, 3,049.55 and 1,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.83 : 3,049.55 = 1,215.12 : x
2. Step 2: Convert to fraction form
   2,209.83/3,049.55 = 1,215.12/x
3. Step 3: Cross multiply
   2,209.83x = 3,049.55 × 1,215.12
4. Step 4: Simplify right side
   2,209.83x = 3,705,563.12
5. Step 5: Solve for x
   x = 3,705,563.12/2,209.83
6. Step 6: Final answer
   x = 1,676.85