Finding the Fourth Proportional to 1,223.74, 1,834.50 and 443.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.74 : 1,834.50 = 443.56 : x
2. Step 2: Convert to fraction form
   1,223.74/1,834.50 = 443.56/x
3. Step 3: Cross multiply
   1,223.74x = 1,834.50 × 443.56
4. Step 4: Simplify right side
   1,223.74x = 813,710.82
5. Step 5: Solve for x
   x = 813,710.82/1,223.74
6. Step 6: Final answer
   x = 664.94