Finding the Fourth Proportional to 12,383.75, 17,089.12 and 7,078.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,383.75 : 17,089.12 = 7,078.25 : x
2. Step 2: Convert to fraction form
   12,383.75/17,089.12 = 7,078.25/x
3. Step 3: Cross multiply
   12,383.75x = 17,089.12 × 7,078.25
4. Step 4: Simplify right side
   12,383.75x = 120,961,063.64
5. Step 5: Solve for x
   x = 120,961,063.64/12,383.75
6. Step 6: Final answer
   x = 9,767.72