Finding the Fourth Proportional to 50,665.50, 69,918.39 and 28,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50,665.50 : 69,918.39 = 28,309.50 : x
2. Step 2: Convert to fraction form
   50,665.50/69,918.39 = 28,309.50/x
3. Step 3: Cross multiply
   50,665.50x = 69,918.39 × 28,309.50
4. Step 4: Simplify right side
   50,665.50x = 1,979,354,661.71
5. Step 5: Solve for x
   x = 1,979,354,661.71/50,665.50
6. Step 6: Final answer
   x = 39,067.11