Finding the Third Proportional to 39.30 and 57.83

Step by Step Solution

1. Step 1: Write the proportion equation
   39.30 : 57.83 = 57.83 : x
2. Step 2: Convert to fraction form
   39.30/57.83 = 57.83/x
3. Step 3: Cross multiply
   39.30x = 57.83 × 57.83
4. Step 4: Simplify right side
   39.30x = 3,344.54
5. Step 5: Solve for x
   x = 3,344.54/39.30
6. Step 6: Final answer
   x = 85.09