Finding the Fourth Proportional to 86,822.50, 119,815.78 and 47,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,822.50 : 119,815.78 = 47,078.50 : x
2. Step 2: Convert to fraction form
   86,822.50/119,815.78 = 47,078.50/x
3. Step 3: Cross multiply
   86,822.50x = 119,815.78 × 47,078.50
4. Step 4: Simplify right side
   86,822.50x = 5,640,747,198.73
5. Step 5: Solve for x
   x = 5,640,747,198.73/86,822.50
6. Step 6: Final answer
   x = 64,968.73