Finding the Fourth Proportional to 1,144.25, 1,579.03 and 678.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.25 : 1,579.03 = 678.50 : x
2. Step 2: Convert to fraction form
   1,144.25/1,579.03 = 678.50/x
3. Step 3: Cross multiply
   1,144.25x = 1,579.03 × 678.50
4. Step 4: Simplify right side
   1,144.25x = 1,071,371.86
5. Step 5: Solve for x
   x = 1,071,371.86/1,144.25
6. Step 6: Final answer
   x = 936.31