Finding the Fourth Proportional to 50,486.92, 69,673.35 and 28,978.51

Step by Step Solution

1. Step 1: Write the proportion equation
   50,486.92 : 69,673.35 = 28,978.51 : x
2. Step 2: Convert to fraction form
   50,486.92/69,673.35 = 28,978.51/x
3. Step 3: Cross multiply
   50,486.92x = 69,673.35 × 28,978.51
4. Step 4: Simplify right side
   50,486.92x = 2,019,029,869.71
5. Step 5: Solve for x
   x = 2,019,029,869.71/50,486.92
6. Step 6: Final answer
   x = 39,991.15