Finding the Fourth Proportional to 1,150.98, 1,588.32 and 678.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.98 : 1,588.32 = 678.89 : x
2. Step 2: Convert to fraction form
   1,150.98/1,588.32 = 678.89/x
3. Step 3: Cross multiply
   1,150.98x = 1,588.32 × 678.89
4. Step 4: Simplify right side
   1,150.98x = 1,078,286.62
5. Step 5: Solve for x
   x = 1,078,286.62/1,150.98
6. Step 6: Final answer
   x = 936.84