Finding the Fourth Proportional to 7,015.92, 9,681.72 and 3,872.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,015.92 : 9,681.72 = 3,872.10 : x
2. Step 2: Convert to fraction form
   7,015.92/9,681.72 = 3,872.10/x
3. Step 3: Cross multiply
   7,015.92x = 9,681.72 × 3,872.10
4. Step 4: Simplify right side
   7,015.92x = 37,488,588.01
5. Step 5: Solve for x
   x = 37,488,588.01/7,015.92
6. Step 6: Final answer
   x = 5,343.36