Finding the Fourth Proportional to 2,443.60, 3,665.94 and 1,211.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.60 : 3,665.94 = 1,211.68 : x
2. Step 2: Convert to fraction form
   2,443.60/3,665.94 = 1,211.68/x
3. Step 3: Cross multiply
   2,443.60x = 3,665.94 × 1,211.68
4. Step 4: Simplify right side
   2,443.60x = 4,441,946.18
5. Step 5: Solve for x
   x = 4,441,946.18/2,443.60
6. Step 6: Final answer
   x = 1,817.79