Finding the Fourth Proportional to 112.41, 168.72 and 89.83

Step by Step Solution

1. Step 1: Write the proportion equation
   112.41 : 168.72 = 89.83 : x
2. Step 2: Convert to fraction form
   112.41/168.72 = 89.83/x
3. Step 3: Cross multiply
   112.41x = 168.72 × 89.83
4. Step 4: Simplify right side
   112.41x = 15,156.12
5. Step 5: Solve for x
   x = 15,156.12/112.41
6. Step 6: Final answer
   x = 134.83