Finding the Fourth Proportional to 112.26, 154.72 and 83.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112.26 : 154.72 = 83.10 : x
2. Step 2: Convert to fraction form
   112.26/154.72 = 83.10/x
3. Step 3: Cross multiply
   112.26x = 154.72 × 83.10
4. Step 4: Simplify right side
   112.26x = 12,856.82
5. Step 5: Solve for x
   x = 12,856.82/112.26
6. Step 6: Final answer
   x = 114.53