Finding the Fourth Proportional to 50,728.89, 69,962.92 and 30,581.36

Step by Step Solution

1. Step 1: Write the proportion equation
   50,728.89 : 69,962.92 = 30,581.36 : x
2. Step 2: Convert to fraction form
   50,728.89/69,962.92 = 30,581.36/x
3. Step 3: Cross multiply
   50,728.89x = 69,962.92 × 30,581.36
4. Step 4: Simplify right side
   50,728.89x = 2,139,561,079.26
5. Step 5: Solve for x
   x = 2,139,561,079.26/50,728.89
6. Step 6: Final answer
   x = 42,176.38