Finding the Fourth Proportional to 50,729.79, 69,984.76 and 30,574.77

Step by Step Solution

1. Step 1: Write the proportion equation
   50,729.79 : 69,984.76 = 30,574.77 : x
2. Step 2: Convert to fraction form
   50,729.79/69,984.76 = 30,574.77/x
3. Step 3: Cross multiply
   50,729.79x = 69,984.76 × 30,574.77
4. Step 4: Simplify right side
   50,729.79x = 2,139,767,658.95
5. Step 5: Solve for x
   x = 2,139,767,658.95/50,729.79
6. Step 6: Final answer
   x = 42,179.70