Finding the Fourth Proportional to 50,896, 70,239.72 and 28,540

Step by Step Solution

1. Step 1: Write the proportion equation
   50,896 : 70,239.72 = 28,540 : x
2. Step 2: Convert to fraction form
   50,896/70,239.72 = 28,540/x
3. Step 3: Cross multiply
   50,896x = 70,239.72 × 28,540
4. Step 4: Simplify right side
   50,896x = 2,004,641,608.80
5. Step 5: Solve for x
   x = 2,004,641,608.80/50,896
6. Step 6: Final answer
   x = 39,387.02