Finding the Fourth Proportional to 143,469.50, 197,989.92 and 78,942.06

Step by Step Solution

1. Step 1: Write the proportion equation
   143,469.50 : 197,989.92 = 78,942.06 : x
2. Step 2: Convert to fraction form
   143,469.50/197,989.92 = 78,942.06/x
3. Step 3: Cross multiply
   143,469.50x = 197,989.92 × 78,942.06
4. Step 4: Simplify right side
   143,469.50x = 15,629,732,144.04
5. Step 5: Solve for x
   x = 15,629,732,144.04/143,469.50
6. Step 6: Final answer
   x = 108,941.15