Finding the Fourth Proportional to 1,144.57, 1,579.67 and 647.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.57 : 1,579.67 = 647.33 : x
2. Step 2: Convert to fraction form
   1,144.57/1,579.67 = 647.33/x
3. Step 3: Cross multiply
   1,144.57x = 1,579.67 × 647.33
4. Step 4: Simplify right side
   1,144.57x = 1,022,567.78
5. Step 5: Solve for x
   x = 1,022,567.78/1,144.57
6. Step 6: Final answer
   x = 893.41