Finding the Fourth Proportional to 1,141.89, 1,711.92 and 448.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.89 : 1,711.92 = 448.73 : x
2. Step 2: Convert to fraction form
   1,141.89/1,711.92 = 448.73/x
3. Step 3: Cross multiply
   1,141.89x = 1,711.92 × 448.73
4. Step 4: Simplify right side
   1,141.89x = 768,189.86
5. Step 5: Solve for x
   x = 768,189.86/1,141.89
6. Step 6: Final answer
   x = 672.74