Finding the Fourth Proportional to 78.89, 118.41 and 50.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78.89 : 118.41 = 50.03 : x
2. Step 2: Convert to fraction form
   78.89/118.41 = 50.03/x
3. Step 3: Cross multiply
   78.89x = 118.41 × 50.03
4. Step 4: Simplify right side
   78.89x = 5,923.80
5. Step 5: Solve for x
   x = 5,923.80/78.89
6. Step 6: Final answer
   x = 75.09