Finding the Fourth Proportional to 105,846.24, 158,544.46 and 71,672.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,846.24 : 158,544.46 = 71,672.78 : x
2. Step 2: Convert to fraction form
   105,846.24/158,544.46 = 71,672.78/x
3. Step 3: Cross multiply
   105,846.24x = 158,544.46 × 71,672.78
4. Step 4: Simplify right side
   105,846.24x = 11,363,321,843.43
5. Step 5: Solve for x
   x = 11,363,321,843.43/105,846.24
6. Step 6: Final answer
   x = 107,356.88