Finding the Fourth Proportional to 2,209.74, 3,049.43 and 1,215.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.74 : 3,049.43 = 1,215.07 : x
2. Step 2: Convert to fraction form
   2,209.74/3,049.43 = 1,215.07/x
3. Step 3: Cross multiply
   2,209.74x = 3,049.43 × 1,215.07
4. Step 4: Simplify right side
   2,209.74x = 3,705,257.21
5. Step 5: Solve for x
   x = 3,705,257.21/2,209.74
6. Step 6: Final answer
   x = 1,676.79