Finding the Fourth Proportional to 123,857.27, 170,923.35 and 72,871.92

Step by Step Solution

1. Step 1: Write the proportion equation
   123,857.27 : 170,923.35 = 72,871.92 : x
2. Step 2: Convert to fraction form
   123,857.27/170,923.35 = 72,871.92/x
3. Step 3: Cross multiply
   123,857.27x = 170,923.35 × 72,871.92
4. Step 4: Simplify right side
   123,857.27x = 12,455,512,687.33
5. Step 5: Solve for x
   x = 12,455,512,687.33/123,857.27
6. Step 6: Final answer
   x = 100,563.44