Finding the Fourth Proportional to 105,728, 158,592 and 31,856

Step by Step Solution

1. Step 1: Write the proportion equation
   105,728 : 158,592 = 31,856 : x
2. Step 2: Convert to fraction form
   105,728/158,592 = 31,856/x
3. Step 3: Cross multiply
   105,728x = 158,592 × 31,856
4. Step 4: Simplify right side
   105,728x = 5,052,106,752
5. Step 5: Solve for x
   x = 5,052,106,752/105,728
6. Step 6: Final answer
   x = 47,784