Finding the Fourth Proportional to 13,866.91, 19,136.38 and 7,579.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,866.91 : 19,136.38 = 7,579.42 : x
2. Step 2: Convert to fraction form
   13,866.91/19,136.38 = 7,579.42/x
3. Step 3: Cross multiply
   13,866.91x = 19,136.38 × 7,579.42
4. Step 4: Simplify right side
   13,866.91x = 145,042,661.30
5. Step 5: Solve for x
   x = 145,042,661.30/13,866.91
6. Step 6: Final answer
   x = 10,459.62