Finding the Fourth Proportional to 12,942.30, 17,860.58 and 7,278.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.30 : 17,860.58 = 7,278.24 : x
2. Step 2: Convert to fraction form
   12,942.30/17,860.58 = 7,278.24/x
3. Step 3: Cross multiply
   12,942.30x = 17,860.58 × 7,278.24
4. Step 4: Simplify right side
   12,942.30x = 129,993,587.78
5. Step 5: Solve for x
   x = 129,993,587.78/12,942.30
6. Step 6: Final answer
   x = 10,044.09