Finding the Fourth Proportional to 50,456.72, 69,631.56 and 28,101.20

Step by Step Solution

1. Step 1: Write the proportion equation
   50,456.72 : 69,631.56 = 28,101.20 : x
2. Step 2: Convert to fraction form
   50,456.72/69,631.56 = 28,101.20/x
3. Step 3: Cross multiply
   50,456.72x = 69,631.56 × 28,101.20
4. Step 4: Simplify right side
   50,456.72x = 1,956,730,393.87
5. Step 5: Solve for x
   x = 1,956,730,393.87/50,456.72
6. Step 6: Final answer
   x = 38,780.37