Finding the Fourth Proportional to 1,150.52, 1,587.92 and 678.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.52 : 1,587.92 = 678.39 : x
2. Step 2: Convert to fraction form
   1,150.52/1,587.92 = 678.39/x
3. Step 3: Cross multiply
   1,150.52x = 1,587.92 × 678.39
4. Step 4: Simplify right side
   1,150.52x = 1,077,221.11
5. Step 5: Solve for x
   x = 1,077,221.11/1,150.52
6. Step 6: Final answer
   x = 936.29