Finding the Fourth Proportional to 1,100.24, 1,648.83 and 579.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.24 : 1,648.83 = 579.21 : x
2. Step 2: Convert to fraction form
   1,100.24/1,648.83 = 579.21/x
3. Step 3: Cross multiply
   1,100.24x = 1,648.83 × 579.21
4. Step 4: Simplify right side
   1,100.24x = 955,018.82
5. Step 5: Solve for x
   x = 955,018.82/1,100.24
6. Step 6: Final answer
   x = 868.01