Finding the Fourth Proportional to 13,168.72, 19,768.27 and 10,404.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,168.72 : 19,768.27 = 10,404.60 : x
2. Step 2: Convert to fraction form
   13,168.72/19,768.27 = 10,404.60/x
3. Step 3: Cross multiply
   13,168.72x = 19,768.27 × 10,404.60
4. Step 4: Simplify right side
   13,168.72x = 205,680,942.04
5. Step 5: Solve for x
   x = 205,680,942.04/13,168.72
6. Step 6: Final answer
   x = 15,618.90