Finding the Fourth Proportional to 1,144.02, 1,578.76 and 678.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.02 : 1,578.76 = 678.26 : x
2. Step 2: Convert to fraction form
   1,144.02/1,578.76 = 678.26/x
3. Step 3: Cross multiply
   1,144.02x = 1,578.76 × 678.26
4. Step 4: Simplify right side
   1,144.02x = 1,070,809.76
5. Step 5: Solve for x
   x = 1,070,809.76/1,144.02
6. Step 6: Final answer
   x = 936.01