Finding the Fourth Proportional to 142,118.22, 196,123.77 and 78,456.54

Step by Step Solution

1. Step 1: Write the proportion equation
   142,118.22 : 196,123.77 = 78,456.54 : x
2. Step 2: Convert to fraction form
   142,118.22/196,123.77 = 78,456.54/x
3. Step 3: Cross multiply
   142,118.22x = 196,123.77 × 78,456.54
4. Step 4: Simplify right side
   142,118.22x = 15,387,192,405.96
5. Step 5: Solve for x
   x = 15,387,192,405.96/142,118.22
6. Step 6: Final answer
   x = 108,270.37