Finding the Fourth Proportional to 7,003.80, 9,665.16 and 3,859.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,003.80 : 9,665.16 = 3,859.92 : x
2. Step 2: Convert to fraction form
   7,003.80/9,665.16 = 3,859.92/x
3. Step 3: Cross multiply
   7,003.80x = 9,665.16 × 3,859.92
4. Step 4: Simplify right side
   7,003.80x = 37,306,744.39
5. Step 5: Solve for x
   x = 37,306,744.39/7,003.80
6. Step 6: Final answer
   x = 5,326.64