Finding the Fourth Proportional to 81,819.39, 112,919.31 and 50,009.49

Step by Step Solution

1. Step 1: Write the proportion equation
   81,819.39 : 112,919.31 = 50,009.49 : x
2. Step 2: Convert to fraction form
   81,819.39/112,919.31 = 50,009.49/x
3. Step 3: Cross multiply
   81,819.39x = 112,919.31 × 50,009.49
4. Step 4: Simplify right side
   81,819.39x = 5,647,037,104.25
5. Step 5: Solve for x
   x = 5,647,037,104.25/81,819.39
6. Step 6: Final answer
   x = 69,018.32