Finding the Fourth Proportional to 10,855.69, 16,283.57 and 2,647.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,855.69 : 16,283.57 = 2,647.69 : x
2. Step 2: Convert to fraction form
   10,855.69/16,283.57 = 2,647.69/x
3. Step 3: Cross multiply
   10,855.69x = 16,283.57 × 2,647.69
4. Step 4: Simplify right side
   10,855.69x = 43,113,791.51
5. Step 5: Solve for x
   x = 43,113,791.51/10,855.69
6. Step 6: Final answer
   x = 3,971.54