Finding the Fourth Proportional to 3,869.40, 5,796.90 and 3,610.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.40 : 5,796.90 = 3,610.20 : x
2. Step 2: Convert to fraction form
   3,869.40/5,796.90 = 3,610.20/x
3. Step 3: Cross multiply
   3,869.40x = 5,796.90 × 3,610.20
4. Step 4: Simplify right side
   3,869.40x = 20,927,968.38
5. Step 5: Solve for x
   x = 20,927,968.38/3,869.40
6. Step 6: Final answer
   x = 5,408.58