Finding the Fourth Proportional to 2,209.81, 3,049.46 and 1,215.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.81 : 3,049.46 = 1,215.03 : x
2. Step 2: Convert to fraction form
   2,209.81/3,049.46 = 1,215.03/x
3. Step 3: Cross multiply
   2,209.81x = 3,049.46 × 1,215.03
4. Step 4: Simplify right side
   2,209.81x = 3,705,179.31
5. Step 5: Solve for x
   x = 3,705,179.31/2,209.81
6. Step 6: Final answer
   x = 1,676.70