Finding the Fourth Proportional to 6,618.65, 9,923.24 and 3,106.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,618.65 : 9,923.24 = 3,106.69 : x
2. Step 2: Convert to fraction form
   6,618.65/9,923.24 = 3,106.69/x
3. Step 3: Cross multiply
   6,618.65x = 9,923.24 × 3,106.69
4. Step 4: Simplify right side
   6,618.65x = 30,828,413.43
5. Step 5: Solve for x
   x = 30,828,413.43/6,618.65
6. Step 6: Final answer
   x = 4,657.81