Finding the Fourth Proportional to 1,489.74, 2,230.46 and 1,123.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.74 : 2,230.46 = 1,123.42 : x
2. Step 2: Convert to fraction form
   1,489.74/2,230.46 = 1,123.42/x
3. Step 3: Cross multiply
   1,489.74x = 2,230.46 × 1,123.42
4. Step 4: Simplify right side
   1,489.74x = 2,505,743.37
5. Step 5: Solve for x
   x = 2,505,743.37/1,489.74
6. Step 6: Final answer
   x = 1,682.00