Finding the Fourth Proportional to 942.69, 1,413.55 and 394.72

Step by Step Solution

1. Step 1: Write the proportion equation
   942.69 : 1,413.55 = 394.72 : x
2. Step 2: Convert to fraction form
   942.69/1,413.55 = 394.72/x
3. Step 3: Cross multiply
   942.69x = 1,413.55 × 394.72
4. Step 4: Simplify right side
   942.69x = 557,956.46
5. Step 5: Solve for x
   x = 557,956.46/942.69
6. Step 6: Final answer
   x = 591.88