Finding the Third Proportional to 76.78 and 118.89

Step by Step Solution

1. Step 1: Write the proportion equation
   76.78 : 118.89 = 118.89 : x
2. Step 2: Convert to fraction form
   76.78/118.89 = 118.89/x
3. Step 3: Cross multiply
   76.78x = 118.89 × 118.89
4. Step 4: Simplify right side
   76.78x = 14,134.98
5. Step 5: Solve for x
   x = 14,134.98/76.78
6. Step 6: Final answer
   x = 184.09