Finding the Fourth Proportional to 7,015.98, 9,681.81 and 3,872.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,015.98 : 9,681.81 = 3,872.16 : x
2. Step 2: Convert to fraction form
   7,015.98/9,681.81 = 3,872.16/x
3. Step 3: Cross multiply
   7,015.98x = 9,681.81 × 3,872.16
4. Step 4: Simplify right side
   7,015.98x = 37,489,517.41
5. Step 5: Solve for x
   x = 37,489,517.41/7,015.98
6. Step 6: Final answer
   x = 5,343.45