Finding the Fourth Proportional to 142,770.71, 197,023.81 and 78,229.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,770.71 : 197,023.81 = 78,229.69 : x
2. Step 2: Convert to fraction form
   142,770.71/197,023.81 = 78,229.69/x
3. Step 3: Cross multiply
   142,770.71x = 197,023.81 × 78,229.69
4. Step 4: Simplify right side
   142,770.71x = 15,413,111,578.92
5. Step 5: Solve for x
   x = 15,413,111,578.92/142,770.71
6. Step 6: Final answer
   x = 107,957.10