Finding the Fourth Proportional to 105,992.48, 158,989.64 and 31,113.86

Step by Step Solution

1. Step 1: Write the proportion equation
   105,992.48 : 158,989.64 = 31,113.86 : x
2. Step 2: Convert to fraction form
   105,992.48/158,989.64 = 31,113.86/x
3. Step 3: Cross multiply
   105,992.48x = 158,989.64 × 31,113.86
4. Step 4: Simplify right side
   105,992.48x = 4,946,780,449.89
5. Step 5: Solve for x
   x = 4,946,780,449.89/105,992.48
6. Step 6: Final answer
   x = 46,671.05