Finding the Third Proportional to 99.28 and 155.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99.28 : 155.34 = 155.34 : x
2. Step 2: Convert to fraction form
   99.28/155.34 = 155.34/x
3. Step 3: Cross multiply
   99.28x = 155.34 × 155.34
4. Step 4: Simplify right side
   99.28x = 24,131.68
5. Step 5: Solve for x
   x = 24,131.68/99.28
6. Step 6: Final answer
   x = 243.06