Finding the Fourth Proportional to 1,404.52, 2,105.76 and 664.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.52 : 2,105.76 = 664.18 : x
2. Step 2: Convert to fraction form
   1,404.52/2,105.76 = 664.18/x
3. Step 3: Cross multiply
   1,404.52x = 2,105.76 × 664.18
4. Step 4: Simplify right side
   1,404.52x = 1,398,603.68
5. Step 5: Solve for x
   x = 1,398,603.68/1,404.52
6. Step 6: Final answer
   x = 995.79