Finding the Fourth Proportional to 91.00, 136.49 and 42.23

Step by Step Solution

1. Step 1: Write the proportion equation
   91.00 : 136.49 = 42.23 : x
2. Step 2: Convert to fraction form
   91.00/136.49 = 42.23/x
3. Step 3: Cross multiply
   91.00x = 136.49 × 42.23
4. Step 4: Simplify right side
   91.00x = 5,764.10
5. Step 5: Solve for x
   x = 5,764.10/91.00
6. Step 6: Final answer
   x = 63.34