Finding the Fourth Proportional to 2,443.72, 3,665.98 and 1,211.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.72 : 3,665.98 = 1,211.18 : x
2. Step 2: Convert to fraction form
   2,443.72/3,665.98 = 1,211.18/x
3. Step 3: Cross multiply
   2,443.72x = 3,665.98 × 1,211.18
4. Step 4: Simplify right side
   2,443.72x = 4,440,161.66
5. Step 5: Solve for x
   x = 4,440,161.66/2,443.72
6. Step 6: Final answer
   x = 1,816.97