Finding the Fourth Proportional to 89.50, 134.25 and 61.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89.50 : 134.25 = 61.18 : x
2. Step 2: Convert to fraction form
   89.50/134.25 = 61.18/x
3. Step 3: Cross multiply
   89.50x = 134.25 × 61.18
4. Step 4: Simplify right side
   89.50x = 8,213.42
5. Step 5: Solve for x
   x = 8,213.42/89.50
6. Step 6: Final answer
   x = 91.77