Finding the Fourth Proportional to 1,455.89, 2,007.75 and 1,123.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,455.89 : 2,007.75 = 1,123.79 : x
2. Step 2: Convert to fraction form
   1,455.89/2,007.75 = 1,123.79/x
3. Step 3: Cross multiply
   1,455.89x = 2,007.75 × 1,123.79
4. Step 4: Simplify right side
   1,455.89x = 2,256,289.37
5. Step 5: Solve for x
   x = 2,256,289.37/1,455.89
6. Step 6: Final answer
   x = 1,549.77