Finding the Fourth Proportional to 50,728.56, 70,007.92 and 30,591.96

Step by Step Solution

1. Step 1: Write the proportion equation
   50,728.56 : 70,007.92 = 30,591.96 : x
2. Step 2: Convert to fraction form
   50,728.56/70,007.92 = 30,591.96/x
3. Step 3: Cross multiply
   50,728.56x = 70,007.92 × 30,591.96
4. Step 4: Simplify right side
   50,728.56x = 2,141,679,488.32
5. Step 5: Solve for x
   x = 2,141,679,488.32/50,728.56
6. Step 6: Final answer
   x = 42,218.42