Finding the Fourth Proportional to 112.00, 167.56 and 81.57

Step by Step Solution

1. Step 1: Write the proportion equation
   112.00 : 167.56 = 81.57 : x
2. Step 2: Convert to fraction form
   112.00/167.56 = 81.57/x
3. Step 3: Cross multiply
   112.00x = 167.56 × 81.57
4. Step 4: Simplify right side
   112.00x = 13,667.46
5. Step 5: Solve for x
   x = 13,667.46/112.00
6. Step 6: Final answer
   x = 122.04