Finding the Fourth Proportional to 10,865.52, 16,200.96 and 10,668.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,865.52 : 16,200.96 = 10,668.69 : x
2. Step 2: Convert to fraction form
   10,865.52/16,200.96 = 10,668.69/x
3. Step 3: Cross multiply
   10,865.52x = 16,200.96 × 10,668.69
4. Step 4: Simplify right side
   10,865.52x = 172,843,019.94
5. Step 5: Solve for x
   x = 172,843,019.94/10,865.52
6. Step 6: Final answer
   x = 15,907.48