Finding the Fourth Proportional to 2,123.22, 3,185.16 and 890.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.22 : 3,185.16 = 890.67 : x
2. Step 2: Convert to fraction form
   2,123.22/3,185.16 = 890.67/x
3. Step 3: Cross multiply
   2,123.22x = 3,185.16 × 890.67
4. Step 4: Simplify right side
   2,123.22x = 2,836,926.46
5. Step 5: Solve for x
   x = 2,836,926.46/2,123.22
6. Step 6: Final answer
   x = 1,336.14