Finding the Fourth Proportional to 142,107.22, 196,109.33 and 78,443.65

Step by Step Solution

1. Step 1: Write the proportion equation
   142,107.22 : 196,109.33 = 78,443.65 : x
2. Step 2: Convert to fraction form
   142,107.22/196,109.33 = 78,443.65/x
3. Step 3: Cross multiply
   142,107.22x = 196,109.33 × 78,443.65
4. Step 4: Simplify right side
   142,107.22x = 15,383,530,271.49
5. Step 5: Solve for x
   x = 15,383,530,271.49/142,107.22
6. Step 6: Final answer
   x = 108,252.99