Finding the Fourth Proportional to 78.98, 118.32 and 50.00

Step by Step Solution

1. Step 1: Write the proportion equation
   78.98 : 118.32 = 50.00 : x
2. Step 2: Convert to fraction form
   78.98/118.32 = 50.00/x
3. Step 3: Cross multiply
   78.98x = 118.32 × 50.00
4. Step 4: Simplify right side
   78.98x = 5,915.41
5. Step 5: Solve for x
   x = 5,915.41/78.98
6. Step 6: Final answer
   x = 74.90