Finding the Third Proportional to 20,545 and 42,061

Step by Step Solution

1. Step 1: Write the proportion equation
   20,545 : 42,061 = 42,061 : x
2. Step 2: Convert to fraction form
   20,545/42,061 = 42,061/x
3. Step 3: Cross multiply
   20,545x = 42,061 × 42,061
4. Step 4: Simplify right side
   20,545x = 1,769,127,721
5. Step 5: Solve for x
   x = 1,769,127,721/20,545
6. Step 6: Final answer
   x = 86,109.89