Finding the Fourth Proportional to 12,383.78, 17,089.62 and 7,078.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,383.78 : 17,089.62 = 7,078.71 : x
2. Step 2: Convert to fraction form
   12,383.78/17,089.62 = 7,078.71/x
3. Step 3: Cross multiply
   12,383.78x = 17,089.62 × 7,078.71
4. Step 4: Simplify right side
   12,383.78x = 120,972,528.08
5. Step 5: Solve for x
   x = 120,972,528.08/12,383.78
6. Step 6: Final answer
   x = 9,768.63