Finding the Fourth Proportional to 1,144.58, 1,579.59 and 647.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.58 : 1,579.59 = 647.24 : x
2. Step 2: Convert to fraction form
   1,144.58/1,579.59 = 647.24/x
3. Step 3: Cross multiply
   1,144.58x = 1,579.59 × 647.24
4. Step 4: Simplify right side
   1,144.58x = 1,022,365.93
5. Step 5: Solve for x
   x = 1,022,365.93/1,144.58
6. Step 6: Final answer
   x = 893.23