Finding the Fourth Proportional to 142,105.53, 196,105.23 and 78,442.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,105.53 : 196,105.23 = 78,442.88 : x
2. Step 2: Convert to fraction form
   142,105.53/196,105.23 = 78,442.88/x
3. Step 3: Cross multiply
   142,105.53x = 196,105.23 × 78,442.88
4. Step 4: Simplify right side
   142,105.53x = 15,383,058,043.74
5. Step 5: Solve for x
   x = 15,383,058,043.74/142,105.53
6. Step 6: Final answer
   x = 108,250.94