Finding the Third Proportional to 21,958 and 42,812

Step by Step Solution

1. Step 1: Write the proportion equation
   21,958 : 42,812 = 42,812 : x
2. Step 2: Convert to fraction form
   21,958/42,812 = 42,812/x
3. Step 3: Cross multiply
   21,958x = 42,812 × 42,812
4. Step 4: Simplify right side
   21,958x = 1,832,867,344
5. Step 5: Solve for x
   x = 1,832,867,344/21,958
6. Step 6: Final answer
   x = 83,471.51