Finding the Fourth Proportional to 105,990.24, 158,986.26 and 31,111.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,990.24 : 158,986.26 = 31,111.62 : x
2. Step 2: Convert to fraction form
   105,990.24/158,986.26 = 31,111.62/x
3. Step 3: Cross multiply
   105,990.24x = 158,986.26 × 31,111.62
4. Step 4: Simplify right side
   105,990.24x = 4,946,320,106.34
5. Step 5: Solve for x
   x = 4,946,320,106.34/105,990.24
6. Step 6: Final answer
   x = 46,667.69