Finding the Fourth Proportional to 11,990.59, 16,563.15 and 10,872.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990.59 : 16,563.15 = 10,872.79 : x
2. Step 2: Convert to fraction form
   11,990.59/16,563.15 = 10,872.79/x
3. Step 3: Cross multiply
   11,990.59x = 16,563.15 × 10,872.79
4. Step 4: Simplify right side
   11,990.59x = 180,087,651.69
5. Step 5: Solve for x
   x = 180,087,651.69/11,990.59
6. Step 6: Final answer
   x = 15,019.08