Finding the Fourth Proportional to 8,653.72, 12,980.92 and 3,388.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,653.72 : 12,980.92 = 3,388.52 : x
2. Step 2: Convert to fraction form
   8,653.72/12,980.92 = 3,388.52/x
3. Step 3: Cross multiply
   8,653.72x = 12,980.92 × 3,388.52
4. Step 4: Simplify right side
   8,653.72x = 43,986,107.04
5. Step 5: Solve for x
   x = 43,986,107.04/8,653.72
6. Step 6: Final answer
   x = 5,082.91