Finding the Fourth Proportional to 1,150.74, 1,587.06 and 865.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.74 : 1,587.06 = 865.89 : x
2. Step 2: Convert to fraction form
   1,150.74/1,587.06 = 865.89/x
3. Step 3: Cross multiply
   1,150.74x = 1,587.06 × 865.89
4. Step 4: Simplify right side
   1,150.74x = 1,374,219.38
5. Step 5: Solve for x
   x = 1,374,219.38/1,150.74
6. Step 6: Final answer
   x = 1,194.20