Finding the Fourth Proportional to 142,571.17, 196,747.46 and 78,906.79

Step by Step Solution

1. Step 1: Write the proportion equation
   142,571.17 : 196,747.46 = 78,906.79 : x
2. Step 2: Convert to fraction form
   142,571.17/196,747.46 = 78,906.79/x
3. Step 3: Cross multiply
   142,571.17x = 196,747.46 × 78,906.79
4. Step 4: Simplify right side
   142,571.17x = 15,524,709,525.52
5. Step 5: Solve for x
   x = 15,524,709,525.52/142,571.17
6. Step 6: Final answer
   x = 108,890.95