Finding the Fourth Proportional to 78.72, 118.00 and 33.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78.72 : 118.00 = 33.02 : x
2. Step 2: Convert to fraction form
   78.72/118.00 = 33.02/x
3. Step 3: Cross multiply
   78.72x = 118.00 × 33.02
4. Step 4: Simplify right side
   78.72x = 3,896.19
5. Step 5: Solve for x
   x = 3,896.19/78.72
6. Step 6: Final answer
   x = 49.50