Finding the Fourth Proportional to 78.94, 118.40 and 50.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78.94 : 118.40 = 50.05 : x
2. Step 2: Convert to fraction form
   78.94/118.40 = 50.05/x
3. Step 3: Cross multiply
   78.94x = 118.40 × 50.05
4. Step 4: Simplify right side
   78.94x = 5,925.82
5. Step 5: Solve for x
   x = 5,925.82/78.94
6. Step 6: Final answer
   x = 75.07