Finding the Third Proportional to 42,078 and 90,717

Step by Step Solution

1. Step 1: Write the proportion equation
   42,078 : 90,717 = 90,717 : x
2. Step 2: Convert to fraction form
   42,078/90,717 = 90,717/x
3. Step 3: Cross multiply
   42,078x = 90,717 × 90,717
4. Step 4: Simplify right side
   42,078x = 8,229,574,089
5. Step 5: Solve for x
   x = 8,229,574,089/42,078
6. Step 6: Final answer
   x = 195,579.02