Finding the Fourth Proportional to 12,469.69, 17,192.60 and 7,986.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.69 : 17,192.60 = 7,986.07 : x
2. Step 2: Convert to fraction form
   12,469.69/17,192.60 = 7,986.07/x
3. Step 3: Cross multiply
   12,469.69x = 17,192.60 × 7,986.07
4. Step 4: Simplify right side
   12,469.69x = 137,301,221.12
5. Step 5: Solve for x
   x = 137,301,221.12/12,469.69
6. Step 6: Final answer
   x = 11,010.80