Finding the Fourth Proportional to 19,591.35, 27,035.98 and 10,638.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,591.35 : 27,035.98 = 10,638.78 : x
2. Step 2: Convert to fraction form
   19,591.35/27,035.98 = 10,638.78/x
3. Step 3: Cross multiply
   19,591.35x = 27,035.98 × 10,638.78
4. Step 4: Simplify right side
   19,591.35x = 287,629,843.30
5. Step 5: Solve for x
   x = 287,629,843.30/19,591.35
6. Step 6: Final answer
   x = 14,681.47