Finding the Fourth Proportional to 105,990.99, 158,987.39 and 31,112.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105,990.99 : 158,987.39 = 31,112.37 : x
2. Step 2: Convert to fraction form
   105,990.99/158,987.39 = 31,112.37/x
3. Step 3: Cross multiply
   105,990.99x = 158,987.39 × 31,112.37
4. Step 4: Simplify right side
   105,990.99x = 4,946,474,347.45
5. Step 5: Solve for x
   x = 4,946,474,347.45/105,990.99
6. Step 6: Final answer
   x = 46,668.82