Finding the Fourth Proportional to 89.06, 132.71 and 83.81

Step by Step Solution

1. Step 1: Write the proportion equation
   89.06 : 132.71 = 83.81 : x
2. Step 2: Convert to fraction form
   89.06/132.71 = 83.81/x
3. Step 3: Cross multiply
   89.06x = 132.71 × 83.81
4. Step 4: Simplify right side
   89.06x = 11,122.34
5. Step 5: Solve for x
   x = 11,122.34/89.06
6. Step 6: Final answer
   x = 124.89