Finding the Fourth Proportional to 50,667.19, 69,920.72 and 28,311.19

Step by Step Solution

1. Step 1: Write the proportion equation
   50,667.19 : 69,920.72 = 28,311.19 : x
2. Step 2: Convert to fraction form
   50,667.19/69,920.72 = 28,311.19/x
3. Step 3: Cross multiply
   50,667.19x = 69,920.72 × 28,311.19
4. Step 4: Simplify right side
   50,667.19x = 1,979,538,578.67
5. Step 5: Solve for x
   x = 1,979,538,578.67/50,667.19
6. Step 6: Final answer
   x = 39,069.44