Finding the Fourth Proportional to 7,003.90, 9,664.81 and 3,860.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,003.90 : 9,664.81 = 3,860.09 : x
2. Step 2: Convert to fraction form
   7,003.90/9,664.81 = 3,860.09/x
3. Step 3: Cross multiply
   7,003.90x = 9,664.81 × 3,860.09
4. Step 4: Simplify right side
   7,003.90x = 37,306,978.46
5. Step 5: Solve for x
   x = 37,306,978.46/7,003.90
6. Step 6: Final answer
   x = 5,326.60