Finding the Fourth Proportional to 1,490.22, 2,233.56 and 1,123.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.22 : 2,233.56 = 1,123.80 : x
2. Step 2: Convert to fraction form
   1,490.22/2,233.56 = 1,123.80/x
3. Step 3: Cross multiply
   1,490.22x = 2,233.56 × 1,123.80
4. Step 4: Simplify right side
   1,490.22x = 2,510,074.73
5. Step 5: Solve for x
   x = 2,510,074.73/1,490.22
6. Step 6: Final answer
   x = 1,684.37