Finding the Fourth Proportional to 91.04, 136.55 and 42.94

Step by Step Solution

1. Step 1: Write the proportion equation
   91.04 : 136.55 = 42.94 : x
2. Step 2: Convert to fraction form
   91.04/136.55 = 42.94/x
3. Step 3: Cross multiply
   91.04x = 136.55 × 42.94
4. Step 4: Simplify right side
   91.04x = 5,863.22
5. Step 5: Solve for x
   x = 5,863.22/91.04
6. Step 6: Final answer
   x = 64.40