Finding the Fourth Proportional to 16,109.12, 22,217.76 and 13,309.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,109.12 : 22,217.76 = 13,309.76 : x
2. Step 2: Convert to fraction form
   16,109.12/22,217.76 = 13,309.76/x
3. Step 3: Cross multiply
   16,109.12x = 22,217.76 × 13,309.76
4. Step 4: Simplify right side
   16,109.12x = 295,713,053.34
5. Step 5: Solve for x
   x = 295,713,053.34/16,109.12
6. Step 6: Final answer
   x = 18,356.87