Finding the Fourth Proportional to 7,003.72, 9,665.04 and 3,859.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,003.72 : 9,665.04 = 3,859.90 : x
2. Step 2: Convert to fraction form
   7,003.72/9,665.04 = 3,859.90/x
3. Step 3: Cross multiply
   7,003.72x = 9,665.04 × 3,859.90
4. Step 4: Simplify right side
   7,003.72x = 37,306,087.90
5. Step 5: Solve for x
   x = 37,306,087.90/7,003.72
6. Step 6: Final answer
   x = 5,326.61