Finding the Fourth Proportional to 100.94, 150.62 and 89.39

Step by Step Solution

1. Step 1: Write the proportion equation
   100.94 : 150.62 = 89.39 : x
2. Step 2: Convert to fraction form
   100.94/150.62 = 89.39/x
3. Step 3: Cross multiply
   100.94x = 150.62 × 89.39
4. Step 4: Simplify right side
   100.94x = 13,464.52
5. Step 5: Solve for x
   x = 13,464.52/100.94
6. Step 6: Final answer
   x = 133.40