Finding the Fourth Proportional to 17,086.74, 25,621.33 and 7,721.69

Step by Step Solution

1. Step 1: Write the proportion equation
   17,086.74 : 25,621.33 = 7,721.69 : x
2. Step 2: Convert to fraction form
   17,086.74/25,621.33 = 7,721.69/x
3. Step 3: Cross multiply
   17,086.74x = 25,621.33 × 7,721.69
4. Step 4: Simplify right side
   17,086.74x = 197,839,839.54
5. Step 5: Solve for x
   x = 197,839,839.54/17,086.74
6. Step 6: Final answer
   x = 11,578.56