Finding the Fourth Proportional to 50,212.31, 69,273.23 and 28,987.47

Step by Step Solution

1. Step 1: Write the proportion equation
   50,212.31 : 69,273.23 = 28,987.47 : x
2. Step 2: Convert to fraction form
   50,212.31/69,273.23 = 28,987.47/x
3. Step 3: Cross multiply
   50,212.31x = 69,273.23 × 28,987.47
4. Step 4: Simplify right side
   50,212.31x = 2,008,055,531.49
5. Step 5: Solve for x
   x = 2,008,055,531.49/50,212.31
6. Step 6: Final answer
   x = 39,991.30