Finding the Fourth Proportional to 1,063.24, 1,603.83 and 1,007.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.24 : 1,603.83 = 1,007.21 : x
2. Step 2: Convert to fraction form
   1,063.24/1,603.83 = 1,007.21/x
3. Step 3: Cross multiply
   1,063.24x = 1,603.83 × 1,007.21
4. Step 4: Simplify right side
   1,063.24x = 1,615,401.40
5. Step 5: Solve for x
   x = 1,615,401.40/1,063.24
6. Step 6: Final answer
   x = 1,519.32