Finding the Fourth Proportional to 7,006.72, 9,669.72 and 3,863.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,006.72 : 9,669.72 = 3,863.20 : x
2. Step 2: Convert to fraction form
   7,006.72/9,669.72 = 3,863.20/x
3. Step 3: Cross multiply
   7,006.72x = 9,669.72 × 3,863.20
4. Step 4: Simplify right side
   7,006.72x = 37,356,062.30
5. Step 5: Solve for x
   x = 37,356,062.30/7,006.72
6. Step 6: Final answer
   x = 5,331.46