Finding the Fourth Proportional to 10,661.15, 15,996.33 and 5,725.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,661.15 : 15,996.33 = 5,725.01 : x
2. Step 2: Convert to fraction form
   10,661.15/15,996.33 = 5,725.01/x
3. Step 3: Cross multiply
   10,661.15x = 15,996.33 × 5,725.01
4. Step 4: Simplify right side
   10,661.15x = 91,579,149.21
5. Step 5: Solve for x
   x = 91,579,149.21/10,661.15
6. Step 6: Final answer
   x = 8,589.99