Finding the Fourth Proportional to 12,456.54, 17,189.38 and 7,078.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.54 : 17,189.38 = 7,078.26 : x
2. Step 2: Convert to fraction form
   12,456.54/17,189.38 = 7,078.26/x
3. Step 3: Cross multiply
   12,456.54x = 17,189.38 × 7,078.26
4. Step 4: Simplify right side
   12,456.54x = 121,670,900.88
5. Step 5: Solve for x
   x = 121,670,900.88/12,456.54
6. Step 6: Final answer
   x = 9,767.63