Finding the Fourth Proportional to 50,672.80, 69,927.69 and 30,540.78

Step by Step Solution

1. Step 1: Write the proportion equation
   50,672.80 : 69,927.69 = 30,540.78 : x
2. Step 2: Convert to fraction form
   50,672.80/69,927.69 = 30,540.78/x
3. Step 3: Cross multiply
   50,672.80x = 69,927.69 × 30,540.78
4. Step 4: Simplify right side
   50,672.80x = 2,135,646,120.27
5. Step 5: Solve for x
   x = 2,135,646,120.27/50,672.80
6. Step 6: Final answer
   x = 42,145.81