Finding the Fourth Proportional to 1,229.42, 1,842.48 and 448.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.42 : 1,842.48 = 448.69 : x
2. Step 2: Convert to fraction form
   1,229.42/1,842.48 = 448.69/x
3. Step 3: Cross multiply
   1,229.42x = 1,842.48 × 448.69
4. Step 4: Simplify right side
   1,229.42x = 826,694.82
5. Step 5: Solve for x
   x = 826,694.82/1,229.42
6. Step 6: Final answer
   x = 672.43