Finding the Fourth Proportional to 7,015.82, 9,681.81 and 3,872

Step by Step Solution

1. Step 1: Write the proportion equation
   7,015.82 : 9,681.81 = 3,872 : x
2. Step 2: Convert to fraction form
   7,015.82/9,681.81 = 3,872/x
3. Step 3: Cross multiply
   7,015.82x = 9,681.81 × 3,872
4. Step 4: Simplify right side
   7,015.82x = 37,487,968.32
5. Step 5: Solve for x
   x = 37,487,968.32/7,015.82
6. Step 6: Final answer
   x = 5,343.35