Finding the Fourth Proportional to 2,123.66, 3,184.46 and 890.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.66 : 3,184.46 = 890.74 : x
2. Step 2: Convert to fraction form
   2,123.66/3,184.46 = 890.74/x
3. Step 3: Cross multiply
   2,123.66x = 3,184.46 × 890.74
4. Step 4: Simplify right side
   2,123.66x = 2,836,522.32
5. Step 5: Solve for x
   x = 2,836,522.32/2,123.66
6. Step 6: Final answer
   x = 1,335.68