Finding the Fourth Proportional to 1,443.55, 2,163.82 and 818.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.55 : 2,163.82 = 818.07 : x
2. Step 2: Convert to fraction form
   1,443.55/2,163.82 = 818.07/x
3. Step 3: Cross multiply
   1,443.55x = 2,163.82 × 818.07
4. Step 4: Simplify right side
   1,443.55x = 1,770,141.32
5. Step 5: Solve for x
   x = 1,770,141.32/1,443.55
6. Step 6: Final answer
   x = 1,226.24