Finding the Fourth Proportional to 12,986.69, 17,927.60 and 7,608.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.69 : 17,927.60 = 7,608.38 : x
2. Step 2: Convert to fraction form
   12,986.69/17,927.60 = 7,608.38/x
3. Step 3: Cross multiply
   12,986.69x = 17,927.60 × 7,608.38
4. Step 4: Simplify right side
   12,986.69x = 136,399,865.61
5. Step 5: Solve for x
   x = 136,399,865.61/12,986.69
6. Step 6: Final answer
   x = 10,503.05