Finding the Third Proportional to 55.50 and 60.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55.50 : 60.75 = 60.75 : x
2. Step 2: Convert to fraction form
   55.50/60.75 = 60.75/x
3. Step 3: Cross multiply
   55.50x = 60.75 × 60.75
4. Step 4: Simplify right side
   55.50x = 3,690.56
5. Step 5: Solve for x
   x = 3,690.56/55.50
6. Step 6: Final answer
   x = 66.50