Finding the Fourth Proportional to 1,544.42, 2,315.89 and 448.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.42 : 2,315.89 = 448.49 : x
2. Step 2: Convert to fraction form
   1,544.42/2,315.89 = 448.49/x
3. Step 3: Cross multiply
   1,544.42x = 2,315.89 × 448.49
4. Step 4: Simplify right side
   1,544.42x = 1,038,653.51
5. Step 5: Solve for x
   x = 1,038,653.51/1,544.42
6. Step 6: Final answer
   x = 672.52