Finding the Fourth Proportional to 2,123.13, 3,184.17 and 890.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.13 : 3,184.17 = 890.56 : x
2. Step 2: Convert to fraction form
   2,123.13/3,184.17 = 890.56/x
3. Step 3: Cross multiply
   2,123.13x = 3,184.17 × 890.56
4. Step 4: Simplify right side
   2,123.13x = 2,835,694.44
5. Step 5: Solve for x
   x = 2,835,694.44/2,123.13
6. Step 6: Final answer
   x = 1,335.62