Finding the Fourth Proportional to 2,123.66, 3,183.06 and 890.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.66 : 3,183.06 = 890.84 : x
2. Step 2: Convert to fraction form
   2,123.66/3,183.06 = 890.84/x
3. Step 3: Cross multiply
   2,123.66x = 3,183.06 × 890.84
4. Step 4: Simplify right side
   2,123.66x = 2,835,597.17
5. Step 5: Solve for x
   x = 2,835,597.17/2,123.66
6. Step 6: Final answer
   x = 1,335.24