Finding the Fourth Proportional to 28,414.27, 39,209.49 and 15,667.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,414.27 : 39,209.49 = 15,667.42 : x
2. Step 2: Convert to fraction form
   28,414.27/39,209.49 = 15,667.42/x
3. Step 3: Cross multiply
   28,414.27x = 39,209.49 × 15,667.42
4. Step 4: Simplify right side
   28,414.27x = 614,311,547.82
5. Step 5: Solve for x
   x = 614,311,547.82/28,414.27
6. Step 6: Final answer
   x = 21,619.83