Finding the Third Proportional to 42,804 and 56,811

Step by Step Solution

1. Step 1: Write the proportion equation
   42,804 : 56,811 = 56,811 : x
2. Step 2: Convert to fraction form
   42,804/56,811 = 56,811/x
3. Step 3: Cross multiply
   42,804x = 56,811 × 56,811
4. Step 4: Simplify right side
   42,804x = 3,227,489,721
5. Step 5: Solve for x
   x = 3,227,489,721/42,804
6. Step 6: Final answer
   x = 75,401.59