Finding the Fourth Proportional to 16,687.80, 23,027.58 and 9,972.09

Step by Step Solution

1. Step 1: Write the proportion equation
   16,687.80 : 23,027.58 = 9,972.09 : x
2. Step 2: Convert to fraction form
   16,687.80/23,027.58 = 9,972.09/x
3. Step 3: Cross multiply
   16,687.80x = 23,027.58 × 9,972.09
4. Step 4: Simplify right side
   16,687.80x = 229,633,100.24
5. Step 5: Solve for x
   x = 229,633,100.24/16,687.80
6. Step 6: Final answer
   x = 13,760.54