Finding the Fourth Proportional to 16,405.50, 22,639.59 and 10,121.52

Step by Step Solution

1. Step 1: Write the proportion equation
   16,405.50 : 22,639.59 = 10,121.52 : x
2. Step 2: Convert to fraction form
   16,405.50/22,639.59 = 10,121.52/x
3. Step 3: Cross multiply
   16,405.50x = 22,639.59 × 10,121.52
4. Step 4: Simplify right side
   16,405.50x = 229,147,062.98
5. Step 5: Solve for x
   x = 229,147,062.98/16,405.50
6. Step 6: Final answer
   x = 13,967.70