Finding the Fourth Proportional to 12,245.36, 16,899.46 and 7,072.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,245.36 : 16,899.46 = 7,072.79 : x
2. Step 2: Convert to fraction form
   12,245.36/16,899.46 = 7,072.79/x
3. Step 3: Cross multiply
   12,245.36x = 16,899.46 × 7,072.79
4. Step 4: Simplify right side
   12,245.36x = 119,526,229.51
5. Step 5: Solve for x
   x = 119,526,229.51/12,245.36
6. Step 6: Final answer
   x = 9,760.94