Finding the Fourth Proportional to 142,167.10, 196,189.35 and 78,505.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,167.10 : 196,189.35 = 78,505.42 : x
2. Step 2: Convert to fraction form
   142,167.10/196,189.35 = 78,505.42/x
3. Step 3: Cross multiply
   142,167.10x = 196,189.35 × 78,505.42
4. Step 4: Simplify right side
   142,167.10x = 15,401,927,321.28
5. Step 5: Solve for x
   x = 15,401,927,321.28/142,167.10
6. Step 6: Final answer
   x = 108,336.79