Finding the Fourth Proportional to 50,721.31, 69,994.92 and 28,365.31

Step by Step Solution

1. Step 1: Write the proportion equation
   50,721.31 : 69,994.92 = 28,365.31 : x
2. Step 2: Convert to fraction form
   50,721.31/69,994.92 = 28,365.31/x
3. Step 3: Cross multiply
   50,721.31x = 69,994.92 × 28,365.31
4. Step 4: Simplify right side
   50,721.31x = 1,985,427,604.23
5. Step 5: Solve for x
   x = 1,985,427,604.23/50,721.31
6. Step 6: Final answer
   x = 39,143.86