Finding the Fourth Proportional to 2,209.86, 3,049.56 and 1,215.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.86 : 3,049.56 = 1,215.18 : x
2. Step 2: Convert to fraction form
   2,209.86/3,049.56 = 1,215.18/x
3. Step 3: Cross multiply
   2,209.86x = 3,049.56 × 1,215.18
4. Step 4: Simplify right side
   2,209.86x = 3,705,764.32
5. Step 5: Solve for x
   x = 3,705,764.32/2,209.86
6. Step 6: Final answer
   x = 1,676.92