Finding the Fourth Proportional to 142,150.14, 196,165.92 and 78,486.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,150.14 : 196,165.92 = 78,486.56 : x
2. Step 2: Convert to fraction form
   142,150.14/196,165.92 = 78,486.56/x
3. Step 3: Cross multiply
   142,150.14x = 196,165.92 × 78,486.56
4. Step 4: Simplify right side
   142,150.14x = 15,396,388,250.04
5. Step 5: Solve for x
   x = 15,396,388,250.04/142,150.14
6. Step 6: Final answer
   x = 108,310.75