Finding the Fourth Proportional to 21,379.27, 32,069.45 and 10,131.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,379.27 : 32,069.45 = 10,131.97 : x
2. Step 2: Convert to fraction form
   21,379.27/32,069.45 = 10,131.97/x
3. Step 3: Cross multiply
   21,379.27x = 32,069.45 × 10,131.97
4. Step 4: Simplify right side
   21,379.27x = 324,926,705.32
5. Step 5: Solve for x
   x = 324,926,705.32/21,379.27
6. Step 6: Final answer
   x = 15,198.21