Finding the Fourth Proportional to 1,219.69, 1,828.22 and 488.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219.69 : 1,828.22 = 488.89 : x
2. Step 2: Convert to fraction form
   1,219.69/1,828.22 = 488.89/x
3. Step 3: Cross multiply
   1,219.69x = 1,828.22 × 488.89
4. Step 4: Simplify right side
   1,219.69x = 893,796.03
5. Step 5: Solve for x
   x = 893,796.03/1,219.69
6. Step 6: Final answer
   x = 732.81