Finding the Fourth Proportional to 142,332.27, 196,428.72 and 78,668.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,332.27 : 196,428.72 = 78,668.70 : x
2. Step 2: Convert to fraction form
   142,332.27/196,428.72 = 78,668.70/x
3. Step 3: Cross multiply
   142,332.27x = 196,428.72 × 78,668.70
4. Step 4: Simplify right side
   142,332.27x = 15,452,792,045.06
5. Step 5: Solve for x
   x = 15,452,792,045.06/142,332.27
6. Step 6: Final answer
   x = 108,568.44