Finding the Fourth Proportional to 19,826, 27,357.37 and 10,871.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,826 : 27,357.37 = 10,871.15 : x
2. Step 2: Convert to fraction form
   19,826/27,357.37 = 10,871.15/x
3. Step 3: Cross multiply
   19,826x = 27,357.37 × 10,871.15
4. Step 4: Simplify right side
   19,826x = 297,406,072.88
5. Step 5: Solve for x
   x = 297,406,072.88/19,826
6. Step 6: Final answer
   x = 15,000.81