Finding the Fourth Proportional to 2,209.62, 3,049.31 and 1,215.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.62 : 3,049.31 = 1,215.01 : x
2. Step 2: Convert to fraction form
   2,209.62/3,049.31 = 1,215.01/x
3. Step 3: Cross multiply
   2,209.62x = 3,049.31 × 1,215.01
4. Step 4: Simplify right side
   2,209.62x = 3,704,942.14
5. Step 5: Solve for x
   x = 3,704,942.14/2,209.62
6. Step 6: Final answer
   x = 1,676.73