Finding the Third Proportional to 18,015 and 42,078

Step by Step Solution

1. Step 1: Write the proportion equation
   18,015 : 42,078 = 42,078 : x
2. Step 2: Convert to fraction form
   18,015/42,078 = 42,078/x
3. Step 3: Cross multiply
   18,015x = 42,078 × 42,078
4. Step 4: Simplify right side
   18,015x = 1,770,558,084
5. Step 5: Solve for x
   x = 1,770,558,084/18,015
6. Step 6: Final answer
   x = 98,282.44