Finding the Fourth Proportional to 91.24, 136.74 and 42.37

Step by Step Solution

1. Step 1: Write the proportion equation
   91.24 : 136.74 = 42.37 : x
2. Step 2: Convert to fraction form
   91.24/136.74 = 42.37/x
3. Step 3: Cross multiply
   91.24x = 136.74 × 42.37
4. Step 4: Simplify right side
   91.24x = 5,793.67
5. Step 5: Solve for x
   x = 5,793.67/91.24
6. Step 6: Final answer
   x = 63.50