Finding the Fourth Proportional to 10,661.86, 16,003.73 and 10,268.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,661.86 : 16,003.73 = 10,268.20 : x
2. Step 2: Convert to fraction form
   10,661.86/16,003.73 = 10,268.20/x
3. Step 3: Cross multiply
   10,661.86x = 16,003.73 × 10,268.20
4. Step 4: Simplify right side
   10,661.86x = 164,329,500.39
5. Step 5: Solve for x
   x = 164,329,500.39/10,661.86
6. Step 6: Final answer
   x = 15,412.84