Finding the Fourth Proportional to 28,744.80, 39,667.72 and 16,169.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,744.80 : 39,667.72 = 16,169.52 : x
2. Step 2: Convert to fraction form
   28,744.80/39,667.72 = 16,169.52/x
3. Step 3: Cross multiply
   28,744.80x = 39,667.72 × 16,169.52
4. Step 4: Simplify right side
   28,744.80x = 641,407,991.89
5. Step 5: Solve for x
   x = 641,407,991.89/28,744.80
6. Step 6: Final answer
   x = 22,313.88