Finding the Fourth Proportional to 50,707.50, 69,979.59 and 28,351.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50,707.50 : 69,979.59 = 28,351.50 : x
2. Step 2: Convert to fraction form
   50,707.50/69,979.59 = 28,351.50/x
3. Step 3: Cross multiply
   50,707.50x = 69,979.59 × 28,351.50
4. Step 4: Simplify right side
   50,707.50x = 1,984,026,345.89
5. Step 5: Solve for x
   x = 1,984,026,345.89/50,707.50
6. Step 6: Final answer
   x = 39,126.88