Finding the Fourth Proportional to 167.27, 250.56 and 86.00

Step by Step Solution

1. Step 1: Write the proportion equation
   167.27 : 250.56 = 86.00 : x
2. Step 2: Convert to fraction form
   167.27/250.56 = 86.00/x
3. Step 3: Cross multiply
   167.27x = 250.56 × 86.00
4. Step 4: Simplify right side
   167.27x = 21,546.91
5. Step 5: Solve for x
   x = 21,546.91/167.27
6. Step 6: Final answer
   x = 128.82