Finding the Fourth Proportional to 142,150.98, 196,169.84 and 78,488.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,150.98 : 196,169.84 = 78,488.62 : x
2. Step 2: Convert to fraction form
   142,150.98/196,169.84 = 78,488.62/x
3. Step 3: Cross multiply
   142,150.98x = 196,169.84 × 78,488.62
4. Step 4: Simplify right side
   142,150.98x = 15,397,100,027.22
5. Step 5: Solve for x
   x = 15,397,100,027.22/142,150.98
6. Step 6: Final answer
   x = 108,315.12