Finding the Fourth Proportional to 1,150.24, 1,587.39 and 678.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.24 : 1,587.39 = 678.41 : x
2. Step 2: Convert to fraction form
   1,150.24/1,587.39 = 678.41/x
3. Step 3: Cross multiply
   1,150.24x = 1,587.39 × 678.41
4. Step 4: Simplify right side
   1,150.24x = 1,076,902.77
5. Step 5: Solve for x
   x = 1,076,902.77/1,150.24
6. Step 6: Final answer
   x = 936.24