Finding the Fourth Proportional to 1,223.69, 1,834.48 and 443.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.69 : 1,834.48 = 443.58 : x
2. Step 2: Convert to fraction form
   1,223.69/1,834.48 = 443.58/x
3. Step 3: Cross multiply
   1,223.69x = 1,834.48 × 443.58
4. Step 4: Simplify right side
   1,223.69x = 813,738.64
5. Step 5: Solve for x
   x = 813,738.64/1,223.69
6. Step 6: Final answer
   x = 664.99