Finding the Fourth Proportional to 7,003.78, 9,665.26 and 3,859.97

Step by Step Solution

1. Step 1: Write the proportion equation
   7,003.78 : 9,665.26 = 3,859.97 : x
2. Step 2: Convert to fraction form
   7,003.78/9,665.26 = 3,859.97/x
3. Step 3: Cross multiply
   7,003.78x = 9,665.26 × 3,859.97
4. Step 4: Simplify right side
   7,003.78x = 37,307,610.03
5. Step 5: Solve for x
   x = 37,307,610.03/7,003.78
6. Step 6: Final answer
   x = 5,326.78