Finding the Fourth Proportional to 7,616.78, 10,515.69 and 4,786.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,616.78 : 10,515.69 = 4,786.55 : x
2. Step 2: Convert to fraction form
   7,616.78/10,515.69 = 4,786.55/x
3. Step 3: Cross multiply
   7,616.78x = 10,515.69 × 4,786.55
4. Step 4: Simplify right side
   7,616.78x = 50,333,823.39
5. Step 5: Solve for x
   x = 50,333,823.39/7,616.78
6. Step 6: Final answer
   x = 6,608.29