Finding the Fourth Proportional to 19,578.89, 27,018.56 and 10,626.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,578.89 : 27,018.56 = 10,626.31 : x
2. Step 2: Convert to fraction form
   19,578.89/27,018.56 = 10,626.31/x
3. Step 3: Cross multiply
   19,578.89x = 27,018.56 × 10,626.31
4. Step 4: Simplify right side
   19,578.89x = 287,107,730.64
5. Step 5: Solve for x
   x = 287,107,730.64/19,578.89
6. Step 6: Final answer
   x = 14,664.15