Finding the Fourth Proportional to 89.86, 134.94 and 74.62

Step by Step Solution

1. Step 1: Write the proportion equation
   89.86 : 134.94 = 74.62 : x
2. Step 2: Convert to fraction form
   89.86/134.94 = 74.62/x
3. Step 3: Cross multiply
   89.86x = 134.94 × 74.62
4. Step 4: Simplify right side
   89.86x = 10,069.22
5. Step 5: Solve for x
   x = 10,069.22/89.86
6. Step 6: Final answer
   x = 112.05