Finding the Fourth Proportional to 10,639.52, 15,960.37 and 4,071.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,639.52 : 15,960.37 = 4,071.23 : x
2. Step 2: Convert to fraction form
   10,639.52/15,960.37 = 4,071.23/x
3. Step 3: Cross multiply
   10,639.52x = 15,960.37 × 4,071.23
4. Step 4: Simplify right side
   10,639.52x = 64,978,337.16
5. Step 5: Solve for x
   x = 64,978,337.16/10,639.52
6. Step 6: Final answer
   x = 6,107.26