Finding the Third Proportional to 20,742 and 43,510

Step by Step Solution

1. Step 1: Write the proportion equation
   20,742 : 43,510 = 43,510 : x
2. Step 2: Convert to fraction form
   20,742/43,510 = 43,510/x
3. Step 3: Cross multiply
   20,742x = 43,510 × 43,510
4. Step 4: Simplify right side
   20,742x = 1,893,120,100
5. Step 5: Solve for x
   x = 1,893,120,100/20,742
6. Step 6: Final answer
   x = 91,269.89