Finding the Fourth Proportional to 105,991.99, 158,988.89 and 31,113.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105,991.99 : 158,988.89 = 31,113.37 : x
2. Step 2: Convert to fraction form
   105,991.99/158,988.89 = 31,113.37/x
3. Step 3: Cross multiply
   105,991.99x = 158,988.89 × 31,113.37
4. Step 4: Simplify right side
   105,991.99x = 4,946,680,160.46
5. Step 5: Solve for x
   x = 4,946,680,160.46/105,991.99
6. Step 6: Final answer
   x = 46,670.32