Finding the Fourth Proportional to 50,725.86, 69,979.68 and 30,571.30

Step by Step Solution

1. Step 1: Write the proportion equation
   50,725.86 : 69,979.68 = 30,571.30 : x
2. Step 2: Convert to fraction form
   50,725.86/69,979.68 = 30,571.30/x
3. Step 3: Cross multiply
   50,725.86x = 69,979.68 × 30,571.30
4. Step 4: Simplify right side
   50,725.86x = 2,139,369,791.18
5. Step 5: Solve for x
   x = 2,139,369,791.18/50,725.86
6. Step 6: Final answer
   x = 42,175.13