Finding the Fourth Proportional to 142,107.50, 196,104.56 and 78,443.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,107.50 : 196,104.56 = 78,443.94 : x
2. Step 2: Convert to fraction form
   142,107.50/196,104.56 = 78,443.94/x
3. Step 3: Cross multiply
   142,107.50x = 196,104.56 × 78,443.94
4. Step 4: Simplify right side
   142,107.50x = 15,383,214,338.37
5. Step 5: Solve for x
   x = 15,383,214,338.37/142,107.50
6. Step 6: Final answer
   x = 108,250.55