Finding the Fourth Proportional to 12,667.64, 17,481.37 and 7,078.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.64 : 17,481.37 = 7,078.64 : x
2. Step 2: Convert to fraction form
   12,667.64/17,481.37 = 7,078.64/x
3. Step 3: Cross multiply
   12,667.64x = 17,481.37 × 7,078.64
4. Step 4: Simplify right side
   12,667.64x = 123,744,331.44
5. Step 5: Solve for x
   x = 123,744,331.44/12,667.64
6. Step 6: Final answer
   x = 9,768.54