Finding the Fourth Proportional to 89.01, 133.56 and 75.30

Step by Step Solution

1. Step 1: Write the proportion equation
   89.01 : 133.56 = 75.30 : x
2. Step 2: Convert to fraction form
   89.01/133.56 = 75.30/x
3. Step 3: Cross multiply
   89.01x = 133.56 × 75.30
4. Step 4: Simplify right side
   89.01x = 10,057.07
5. Step 5: Solve for x
   x = 10,057.07/89.01
6. Step 6: Final answer
   x = 112.99