Finding the Fourth Proportional to 7,028.89, 9,699.88 and 3,885.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,028.89 : 9,699.88 = 3,885.28 : x
2. Step 2: Convert to fraction form
   7,028.89/9,699.88 = 3,885.28/x
3. Step 3: Cross multiply
   7,028.89x = 9,699.88 × 3,885.28
4. Step 4: Simplify right side
   7,028.89x = 37,686,749.77
5. Step 5: Solve for x
   x = 37,686,749.77/7,028.89
6. Step 6: Final answer
   x = 5,361.69