Finding the Third Proportional to 72.75 and 117.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72.75 : 117.56 = 117.56 : x
2. Step 2: Convert to fraction form
   72.75/117.56 = 117.56/x
3. Step 3: Cross multiply
   72.75x = 117.56 × 117.56
4. Step 4: Simplify right side
   72.75x = 13,820.94
5. Step 5: Solve for x
   x = 13,820.94/72.75
6. Step 6: Final answer
   x = 189.98