Finding the Fourth Proportional to 12,939, 17,855.82 and 7,351.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,939 : 17,855.82 = 7,351.08 : x
2. Step 2: Convert to fraction form
   12,939/17,855.82 = 7,351.08/x
3. Step 3: Cross multiply
   12,939x = 17,855.82 × 7,351.08
4. Step 4: Simplify right side
   12,939x = 131,259,561.29
5. Step 5: Solve for x
   x = 131,259,561.29/12,939
6. Step 6: Final answer
   x = 10,144.49