Finding the Fourth Proportional to 12,196.19, 16,828.46 and 7,716.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.19 : 16,828.46 = 7,716.80 : x
2. Step 2: Convert to fraction form
   12,196.19/16,828.46 = 7,716.80/x
3. Step 3: Cross multiply
   12,196.19x = 16,828.46 × 7,716.80
4. Step 4: Simplify right side
   12,196.19x = 129,861,737.40
5. Step 5: Solve for x
   x = 129,861,737.40/12,196.19
6. Step 6: Final answer
   x = 10,647.73