Finding the Fourth Proportional to 13,936.65, 19,231.30 and 8,270.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,936.65 : 19,231.30 = 8,270.42 : x
2. Step 2: Convert to fraction form
   13,936.65/19,231.30 = 8,270.42/x
3. Step 3: Cross multiply
   13,936.65x = 19,231.30 × 8,270.42
4. Step 4: Simplify right side
   13,936.65x = 159,050,928.15
5. Step 5: Solve for x
   x = 159,050,928.15/13,936.65
6. Step 6: Final answer
   x = 11,412.42