Finding the Fourth Proportional to 91.04, 136.52 and 42.96

Step by Step Solution

1. Step 1: Write the proportion equation
   91.04 : 136.52 = 42.96 : x
2. Step 2: Convert to fraction form
   91.04/136.52 = 42.96/x
3. Step 3: Cross multiply
   91.04x = 136.52 × 42.96
4. Step 4: Simplify right side
   91.04x = 5,864.90
5. Step 5: Solve for x
   x = 5,864.90/91.04
6. Step 6: Final answer
   x = 64.42