Finding the Fourth Proportional to 1,144.49, 1,579.46 and 646.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.49 : 1,579.46 = 646.94 : x
2. Step 2: Convert to fraction form
   1,144.49/1,579.46 = 646.94/x
3. Step 3: Cross multiply
   1,144.49x = 1,579.46 × 646.94
4. Step 4: Simplify right side
   1,144.49x = 1,021,804.72
5. Step 5: Solve for x
   x = 1,021,804.72/1,144.49
6. Step 6: Final answer
   x = 892.81