Finding the Fourth Proportional to 12,144.45, 16,759.31 and 7,109.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.45 : 16,759.31 = 7,109.61 : x
2. Step 2: Convert to fraction form
   12,144.45/16,759.31 = 7,109.61/x
3. Step 3: Cross multiply
   12,144.45x = 16,759.31 × 7,109.61
4. Step 4: Simplify right side
   12,144.45x = 119,152,122.42
5. Step 5: Solve for x
   x = 119,152,122.42/12,144.45
6. Step 6: Final answer
   x = 9,811.24