Finding the Fourth Proportional to 89.30, 133.72 and 74.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89.30 : 133.72 = 74.82 : x
2. Step 2: Convert to fraction form
   89.30/133.72 = 74.82/x
3. Step 3: Cross multiply
   89.30x = 133.72 × 74.82
4. Step 4: Simplify right side
   89.30x = 10,004.07
5. Step 5: Solve for x
   x = 10,004.07/89.30
6. Step 6: Final answer
   x = 112.03