Finding the Fourth Proportional to 1,217.54, 1,825.59 and 448.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217.54 : 1,825.59 = 448.10 : x
2. Step 2: Convert to fraction form
   1,217.54/1,825.59 = 448.10/x
3. Step 3: Cross multiply
   1,217.54x = 1,825.59 × 448.10
4. Step 4: Simplify right side
   1,217.54x = 818,046.88
5. Step 5: Solve for x
   x = 818,046.88/1,217.54
6. Step 6: Final answer
   x = 671.89