Finding the Fourth Proportional to 13,866.72, 19,136.06 and 7,579.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,866.72 : 19,136.06 = 7,579.09 : x
2. Step 2: Convert to fraction form
   13,866.72/19,136.06 = 7,579.09/x
3. Step 3: Cross multiply
   13,866.72x = 19,136.06 × 7,579.09
4. Step 4: Simplify right side
   13,866.72x = 145,033,978.06
5. Step 5: Solve for x
   x = 145,033,978.06/13,866.72
6. Step 6: Final answer
   x = 10,459.14