Finding the Fourth Proportional to 142,503.27, 196,653.69 and 78,839.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,503.27 : 196,653.69 = 78,839.70 : x
2. Step 2: Convert to fraction form
   142,503.27/196,653.69 = 78,839.70/x
3. Step 3: Cross multiply
   142,503.27x = 196,653.69 × 78,839.70
4. Step 4: Simplify right side
   142,503.27x = 15,504,117,923.49
5. Step 5: Solve for x
   x = 15,504,117,923.49/142,503.27
6. Step 6: Final answer
   x = 108,798.33