Finding the Fourth Proportional to 16,291.17, 22,476.59 and 9,120.03

Step by Step Solution

1. Step 1: Write the proportion equation
   16,291.17 : 22,476.59 = 9,120.03 : x
2. Step 2: Convert to fraction form
   16,291.17/22,476.59 = 9,120.03/x
3. Step 3: Cross multiply
   16,291.17x = 22,476.59 × 9,120.03
4. Step 4: Simplify right side
   16,291.17x = 204,987,174.23
5. Step 5: Solve for x
   x = 204,987,174.23/16,291.17
6. Step 6: Final answer
   x = 12,582.72