Finding the Fourth Proportional to 16,581.52, 22,891.32 and 13,315.83

Step by Step Solution

1. Step 1: Write the proportion equation
   16,581.52 : 22,891.32 = 13,315.83 : x
2. Step 2: Convert to fraction form
   16,581.52/22,891.32 = 13,315.83/x
3. Step 3: Cross multiply
   16,581.52x = 22,891.32 × 13,315.83
4. Step 4: Simplify right side
   16,581.52x = 304,816,839.75
5. Step 5: Solve for x
   x = 304,816,839.75/16,581.52
6. Step 6: Final answer
   x = 18,382.93