Finding the Third Proportional to 20,378 and 42,968

Step by Step Solution

1. Step 1: Write the proportion equation
   20,378 : 42,968 = 42,968 : x
2. Step 2: Convert to fraction form
   20,378/42,968 = 42,968/x
3. Step 3: Cross multiply
   20,378x = 42,968 × 42,968
4. Step 4: Simplify right side
   20,378x = 1,846,249,024
5. Step 5: Solve for x
   x = 1,846,249,024/20,378
6. Step 6: Final answer
   x = 90,600.11