Finding the Third Proportional to 42.13 and 57.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42.13 : 57.75 = 57.75 : x
2. Step 2: Convert to fraction form
   42.13/57.75 = 57.75/x
3. Step 3: Cross multiply
   42.13x = 57.75 × 57.75
4. Step 4: Simplify right side
   42.13x = 3,335.06
5. Step 5: Solve for x
   x = 3,335.06/42.13
6. Step 6: Final answer
   x = 79.17