Finding the Third Proportional to 90.69 and 118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90.69 : 118.72 = 118.72 : x
2. Step 2: Convert to fraction form
   90.69/118.72 = 118.72/x
3. Step 3: Cross multiply
   90.69x = 118.72 × 118.72
4. Step 4: Simplify right side
   90.69x = 14,094.14
5. Step 5: Solve for x
   x = 14,094.14/90.69
6. Step 6: Final answer
   x = 155.41