Finding the Fourth Proportional to 16,379.98, 22,605.17 and 9,212.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,379.98 : 22,605.17 = 9,212.15 : x
2. Step 2: Convert to fraction form
   16,379.98/22,605.17 = 9,212.15/x
3. Step 3: Cross multiply
   16,379.98x = 22,605.17 × 9,212.15
4. Step 4: Simplify right side
   16,379.98x = 208,242,216.82
5. Step 5: Solve for x
   x = 208,242,216.82/16,379.98
6. Step 6: Final answer
   x = 12,713.22