Finding the Third Proportional to 21,948 and 42,789

Step by Step Solution

1. Step 1: Write the proportion equation
   21,948 : 42,789 = 42,789 : x
2. Step 2: Convert to fraction form
   21,948/42,789 = 42,789/x
3. Step 3: Cross multiply
   21,948x = 42,789 × 42,789
4. Step 4: Simplify right side
   21,948x = 1,830,898,521
5. Step 5: Solve for x
   x = 1,830,898,521/21,948
6. Step 6: Final answer
   x = 83,419.83