Finding the Fourth Proportional to 12,668.68, 17,480.82 and 7,078.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,668.68 : 17,480.82 = 7,078.60 : x
2. Step 2: Convert to fraction form
   12,668.68/17,480.82 = 7,078.60/x
3. Step 3: Cross multiply
   12,668.68x = 17,480.82 × 7,078.60
4. Step 4: Simplify right side
   12,668.68x = 123,739,732.45
5. Step 5: Solve for x
   x = 123,739,732.45/12,668.68
6. Step 6: Final answer
   x = 9,767.37