Finding the Fourth Proportional to 16,821.59, 23,215.61 and 9,268.68

Step by Step Solution

1. Step 1: Write the proportion equation
   16,821.59 : 23,215.61 = 9,268.68 : x
2. Step 2: Convert to fraction form
   16,821.59/23,215.61 = 9,268.68/x
3. Step 3: Cross multiply
   16,821.59x = 23,215.61 × 9,268.68
4. Step 4: Simplify right side
   16,821.59x = 215,178,060.09
5. Step 5: Solve for x
   x = 215,178,060.09/16,821.59
6. Step 6: Final answer
   x = 12,791.78