Finding the Fourth Proportional to 111.00, 166.40 and 42.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111.00 : 166.40 = 42.48 : x
2. Step 2: Convert to fraction form
   111.00/166.40 = 42.48/x
3. Step 3: Cross multiply
   111.00x = 166.40 × 42.48
4. Step 4: Simplify right side
   111.00x = 7,069.19
5. Step 5: Solve for x
   x = 7,069.19/111.00
6. Step 6: Final answer
   x = 63.69