Finding the Fourth Proportional to 105,864.89, 158,676.54 and 42,644.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,864.89 : 158,676.54 = 42,644.56 : x
2. Step 2: Convert to fraction form
   105,864.89/158,676.54 = 42,644.56/x
3. Step 3: Cross multiply
   105,864.89x = 158,676.54 × 42,644.56
4. Step 4: Simplify right side
   105,864.89x = 6,766,691,230.62
5. Step 5: Solve for x
   x = 6,766,691,230.62/105,864.89
6. Step 6: Final answer
   x = 63,918.18