Finding the Fourth Proportional to 142,166.10, 196,187.97 and 78,504.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,166.10 : 196,187.97 = 78,504.42 : x
2. Step 2: Convert to fraction form
   142,166.10/196,187.97 = 78,504.42/x
3. Step 3: Cross multiply
   142,166.10x = 196,187.97 × 78,504.42
4. Step 4: Simplify right side
   142,166.10x = 15,401,622,795.83
5. Step 5: Solve for x
   x = 15,401,622,795.83/142,166.10
6. Step 6: Final answer
   x = 108,335.41