Finding the Fourth Proportional to 195,111.72, 269,253.72 and 105,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   195,111.72 : 269,253.72 = 105,687.72 : x
2. Step 2: Convert to fraction form
   195,111.72/269,253.72 = 105,687.72/x
3. Step 3: Cross multiply
   195,111.72x = 269,253.72 × 105,687.72
4. Step 4: Simplify right side
   195,111.72x = 28,456,811,768.32
5. Step 5: Solve for x
   x = 28,456,811,768.32/195,111.72
6. Step 6: Final answer
   x = 145,848.81