Finding the Fourth Proportional to 1,488.77, 2,233.17 and 448.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.77 : 2,233.17 = 448.78 : x
2. Step 2: Convert to fraction form
   1,488.77/2,233.17 = 448.78/x
3. Step 3: Cross multiply
   1,488.77x = 2,233.17 × 448.78
4. Step 4: Simplify right side
   1,488.77x = 1,002,188.62
5. Step 5: Solve for x
   x = 1,002,188.62/1,488.77
6. Step 6: Final answer
   x = 673.17