Finding the Fourth Proportional to 50,724.86, 69,978.30 and 30,570.30

Step by Step Solution

1. Step 1: Write the proportion equation
   50,724.86 : 69,978.30 = 30,570.30 : x
2. Step 2: Convert to fraction form
   50,724.86/69,978.30 = 30,570.30/x
3. Step 3: Cross multiply
   50,724.86x = 69,978.30 × 30,570.30
4. Step 4: Simplify right side
   50,724.86x = 2,139,257,624.49
5. Step 5: Solve for x
   x = 2,139,257,624.49/50,724.86
6. Step 6: Final answer
   x = 42,173.75