Finding the Fourth Proportional to 10,326.65, 15,480.59 and 4,778.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,326.65 : 15,480.59 = 4,778.51 : x
2. Step 2: Convert to fraction form
   10,326.65/15,480.59 = 4,778.51/x
3. Step 3: Cross multiply
   10,326.65x = 15,480.59 × 4,778.51
4. Step 4: Simplify right side
   10,326.65x = 73,974,052.83
5. Step 5: Solve for x
   x = 73,974,052.83/10,326.65
6. Step 6: Final answer
   x = 7,163.42