Finding the Fourth Proportional to 2,123.46, 3,185.82 and 890.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.46 : 3,185.82 = 890.24 : x
2. Step 2: Convert to fraction form
   2,123.46/3,185.82 = 890.24/x
3. Step 3: Cross multiply
   2,123.46x = 3,185.82 × 890.24
4. Step 4: Simplify right side
   2,123.46x = 2,836,128.47
5. Step 5: Solve for x
   x = 2,836,128.47/2,123.46
6. Step 6: Final answer
   x = 1,335.62