Finding the Third Proportional to 19,954 and 42,215

Step by Step Solution

1. Step 1: Write the proportion equation
   19,954 : 42,215 = 42,215 : x
2. Step 2: Convert to fraction form
   19,954/42,215 = 42,215/x
3. Step 3: Cross multiply
   19,954x = 42,215 × 42,215
4. Step 4: Simplify right side
   19,954x = 1,782,106,225
5. Step 5: Solve for x
   x = 1,782,106,225/19,954
6. Step 6: Final answer
   x = 89,310.73