Finding the Third Proportional to 20,991 and 42,954

Step by Step Solution

1. Step 1: Write the proportion equation
   20,991 : 42,954 = 42,954 : x
2. Step 2: Convert to fraction form
   20,991/42,954 = 42,954/x
3. Step 3: Cross multiply
   20,991x = 42,954 × 42,954
4. Step 4: Simplify right side
   20,991x = 1,845,046,116
5. Step 5: Solve for x
   x = 1,845,046,116/20,991
6. Step 6: Final answer
   x = 87,897.01