Finding the Fourth Proportional to 89.42, 134.18 and 40.70

Step by Step Solution

1. Step 1: Write the proportion equation
   89.42 : 134.18 = 40.70 : x
2. Step 2: Convert to fraction form
   89.42/134.18 = 40.70/x
3. Step 3: Cross multiply
   89.42x = 134.18 × 40.70
4. Step 4: Simplify right side
   89.42x = 5,460.25
5. Step 5: Solve for x
   x = 5,460.25/89.42
6. Step 6: Final answer
   x = 61.07