Finding the Third Proportional to 289.41 and 413.86

Step by Step Solution

1. Step 1: Write the proportion equation
   289.41 : 413.86 = 413.86 : x
2. Step 2: Convert to fraction form
   289.41/413.86 = 413.86/x
3. Step 3: Cross multiply
   289.41x = 413.86 × 413.86
4. Step 4: Simplify right side
   289.41x = 171,279.58
5. Step 5: Solve for x
   x = 171,279.58/289.41
6. Step 6: Final answer
   x = 591.83