Finding the Fourth Proportional to 50,728.50, 70,005.57 and 28,372.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50,728.50 : 70,005.57 = 28,372.50 : x
2. Step 2: Convert to fraction form
   50,728.50/70,005.57 = 28,372.50/x
3. Step 3: Cross multiply
   50,728.50x = 70,005.57 × 28,372.50
4. Step 4: Simplify right side
   50,728.50x = 1,986,233,034.83
5. Step 5: Solve for x
   x = 1,986,233,034.83/50,728.50
6. Step 6: Final answer
   x = 39,154.18