Finding the Fourth Proportional to 2,443.69, 3,662.79 and 1,211.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.69 : 3,662.79 = 1,211.99 : x
2. Step 2: Convert to fraction form
   2,443.69/3,662.79 = 1,211.99/x
3. Step 3: Cross multiply
   2,443.69x = 3,662.79 × 1,211.99
4. Step 4: Simplify right side
   2,443.69x = 4,439,240.48
5. Step 5: Solve for x
   x = 4,439,240.48/2,443.69
6. Step 6: Final answer
   x = 1,816.61