Finding the Fourth Proportional to 16,380.98, 22,605.72 and 9,210.92

Step by Step Solution

1. Step 1: Write the proportion equation
   16,380.98 : 22,605.72 = 9,210.92 : x
2. Step 2: Convert to fraction form
   16,380.98/22,605.72 = 9,210.92/x
3. Step 3: Cross multiply
   16,380.98x = 22,605.72 × 9,210.92
4. Step 4: Simplify right side
   16,380.98x = 208,219,478.46
5. Step 5: Solve for x
   x = 208,219,478.46/16,380.98
6. Step 6: Final answer
   x = 12,711.05