Finding the Fourth Proportional to 50,665.86, 69,918.72 and 28,309.86

Step by Step Solution

1. Step 1: Write the proportion equation
   50,665.86 : 69,918.72 = 28,309.86 : x
2. Step 2: Convert to fraction form
   50,665.86/69,918.72 = 28,309.86/x
3. Step 3: Cross multiply
   50,665.86x = 69,918.72 × 28,309.86
4. Step 4: Simplify right side
   50,665.86x = 1,979,389,174.58
5. Step 5: Solve for x
   x = 1,979,389,174.58/50,665.86
6. Step 6: Final answer
   x = 39,067.51