Finding the Fourth Proportional to 12,393, 17,103.25 and 7,678.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,393 : 17,103.25 = 7,678.19 : x
2. Step 2: Convert to fraction form
   12,393/17,103.25 = 7,678.19/x
3. Step 3: Cross multiply
   12,393x = 17,103.25 × 7,678.19
4. Step 4: Simplify right side
   12,393x = 131,322,055.47
5. Step 5: Solve for x
   x = 131,322,055.47/12,393
6. Step 6: Final answer
   x = 10,596.47