Finding the Fourth Proportional to 1,144.00, 1,578.73 and 620.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.00 : 1,578.73 = 620.04 : x
2. Step 2: Convert to fraction form
   1,144.00/1,578.73 = 620.04/x
3. Step 3: Cross multiply
   1,144.00x = 1,578.73 × 620.04
4. Step 4: Simplify right side
   1,144.00x = 978,867.09
5. Step 5: Solve for x
   x = 978,867.09/1,144.00
6. Step 6: Final answer
   x = 855.65