Finding the Fourth Proportional to 1,150.98, 1,588.56 and 678.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.98 : 1,588.56 = 678.85 : x
2. Step 2: Convert to fraction form
   1,150.98/1,588.56 = 678.85/x
3. Step 3: Cross multiply
   1,150.98x = 1,588.56 × 678.85
4. Step 4: Simplify right side
   1,150.98x = 1,078,393.96
5. Step 5: Solve for x
   x = 1,078,393.96/1,150.98
6. Step 6: Final answer
   x = 936.94