Finding the Fourth Proportional to 10,936.09, 16,379.47 and 5,080.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,936.09 : 16,379.47 = 5,080.38 : x
2. Step 2: Convert to fraction form
   10,936.09/16,379.47 = 5,080.38/x
3. Step 3: Cross multiply
   10,936.09x = 16,379.47 × 5,080.38
4. Step 4: Simplify right side
   10,936.09x = 83,213,931.80
5. Step 5: Solve for x
   x = 83,213,931.80/10,936.09
6. Step 6: Final answer
   x = 7,609.11