Finding the Fourth Proportional to 112.97, 168.33 and 105.98

Step by Step Solution

1. Step 1: Write the proportion equation
   112.97 : 168.33 = 105.98 : x
2. Step 2: Convert to fraction form
   112.97/168.33 = 105.98/x
3. Step 3: Cross multiply
   112.97x = 168.33 × 105.98
4. Step 4: Simplify right side
   112.97x = 17,839.61
5. Step 5: Solve for x
   x = 17,839.61/112.97
6. Step 6: Final answer
   x = 157.91