Finding the Fourth Proportional to 154,745.97, 213,438.83 and 142,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,745.97 : 213,438.83 = 142,039.50 : x
2. Step 2: Convert to fraction form
   154,745.97/213,438.83 = 142,039.50/x
3. Step 3: Cross multiply
   154,745.97x = 213,438.83 × 142,039.50
4. Step 4: Simplify right side
   154,745.97x = 30,316,743,983.59
5. Step 5: Solve for x
   x = 30,316,743,983.59/154,745.97
6. Step 6: Final answer
   x = 195,912.98