Finding the Fourth Proportional to 89.61, 134.42 and 73.55

Step by Step Solution

1. Step 1: Write the proportion equation
   89.61 : 134.42 = 73.55 : x
2. Step 2: Convert to fraction form
   89.61/134.42 = 73.55/x
3. Step 3: Cross multiply
   89.61x = 134.42 × 73.55
4. Step 4: Simplify right side
   89.61x = 9,886.01
5. Step 5: Solve for x
   x = 9,886.01/89.61
6. Step 6: Final answer
   x = 110.32