Finding the Fourth Proportional to 100.05, 149.88 and 89.33

Step by Step Solution

1. Step 1: Write the proportion equation
   100.05 : 149.88 = 89.33 : x
2. Step 2: Convert to fraction form
   100.05/149.88 = 89.33/x
3. Step 3: Cross multiply
   100.05x = 149.88 × 89.33
4. Step 4: Simplify right side
   100.05x = 13,388.37
5. Step 5: Solve for x
   x = 13,388.37/100.05
6. Step 6: Final answer
   x = 133.82