Finding the Fourth Proportional to 8,994.60, 12,413.46 and 5,639.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,994.60 : 12,413.46 = 5,639.94 : x
2. Step 2: Convert to fraction form
   8,994.60/12,413.46 = 5,639.94/x
3. Step 3: Cross multiply
   8,994.60x = 12,413.46 × 5,639.94
4. Step 4: Simplify right side
   8,994.60x = 70,011,169.59
5. Step 5: Solve for x
   x = 70,011,169.59/8,994.60
6. Step 6: Final answer
   x = 7,783.69