Finding the Fourth Proportional to 1,150.59, 1,587.82 and 678.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.59 : 1,587.82 = 678.49 : x
2. Step 2: Convert to fraction form
   1,150.59/1,587.82 = 678.49/x
3. Step 3: Cross multiply
   1,150.59x = 1,587.82 × 678.49
4. Step 4: Simplify right side
   1,150.59x = 1,077,319.99
5. Step 5: Solve for x
   x = 1,077,319.99/1,150.59
6. Step 6: Final answer
   x = 936.32