Finding the Fourth Proportional to 142,105.64, 196,105.82 and 78,443.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.64 : 196,105.82 = 78,443.48 : x
2. Step 2: Convert to fraction form
   142,105.64/196,105.82 = 78,443.48/x
3. Step 3: Cross multiply
   142,105.64x = 196,105.82 × 78,443.48
4. Step 4: Simplify right side
   142,105.64x = 15,383,222,969.05
5. Step 5: Solve for x
   x = 15,383,222,969.05/142,105.64
6. Step 6: Final answer
   x = 108,252.02