Finding the Fourth Proportional to 6,663.36, 9,196.56 and 3,871.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,663.36 : 9,196.56 = 3,871.20 : x
2. Step 2: Convert to fraction form
   6,663.36/9,196.56 = 3,871.20/x
3. Step 3: Cross multiply
   6,663.36x = 9,196.56 × 3,871.20
4. Step 4: Simplify right side
   6,663.36x = 35,601,723.07
5. Step 5: Solve for x
   x = 35,601,723.07/6,663.36
6. Step 6: Final answer
   x = 5,342.91