Finding the Third Proportional to 54.72 and 83.83

Step by Step Solution

1. Step 1: Write the proportion equation
   54.72 : 83.83 = 83.83 : x
2. Step 2: Convert to fraction form
   54.72/83.83 = 83.83/x
3. Step 3: Cross multiply
   54.72x = 83.83 × 83.83
4. Step 4: Simplify right side
   54.72x = 7,027.15
5. Step 5: Solve for x
   x = 7,027.15/54.72
6. Step 6: Final answer
   x = 128.42