Finding the Fourth Proportional to 1,144.83, 1,579.91 and 647.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.83 : 1,579.91 = 647.49 : x
2. Step 2: Convert to fraction form
   1,144.83/1,579.91 = 647.49/x
3. Step 3: Cross multiply
   1,144.83x = 1,579.91 × 647.49
4. Step 4: Simplify right side
   1,144.83x = 1,022,978.61
5. Step 5: Solve for x
   x = 1,022,978.61/1,144.83
6. Step 6: Final answer
   x = 893.56