Finding the Fourth Proportional to 2,123.41, 3,183.89 and 823.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.41 : 3,183.89 = 823.36 : x
2. Step 2: Convert to fraction form
   2,123.41/3,183.89 = 823.36/x
3. Step 3: Cross multiply
   2,123.41x = 3,183.89 × 823.36
4. Step 4: Simplify right side
   2,123.41x = 2,621,492.16
5. Step 5: Solve for x
   x = 2,621,492.16/2,123.41
6. Step 6: Final answer
   x = 1,234.57