Finding the Fourth Proportional to 16,381.98, 22,589.69 and 10,721.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,381.98 : 22,589.69 = 10,721.57 : x
2. Step 2: Convert to fraction form
   16,381.98/22,589.69 = 10,721.57/x
3. Step 3: Cross multiply
   16,381.98x = 22,589.69 × 10,721.57
4. Step 4: Simplify right side
   16,381.98x = 242,196,776.06
5. Step 5: Solve for x
   x = 242,196,776.06/16,381.98
6. Step 6: Final answer
   x = 14,784.34