Finding the Third Proportional to 20,984 and 42,940

Step by Step Solution

1. Step 1: Write the proportion equation
   20,984 : 42,940 = 42,940 : x
2. Step 2: Convert to fraction form
   20,984/42,940 = 42,940/x
3. Step 3: Cross multiply
   20,984x = 42,940 × 42,940
4. Step 4: Simplify right side
   20,984x = 1,843,843,600
5. Step 5: Solve for x
   x = 1,843,843,600/20,984
6. Step 6: Final answer
   x = 87,869.02