Finding the Third Proportional to 19,215 and 42,075

Step by Step Solution

1. Step 1: Write the proportion equation
   19,215 : 42,075 = 42,075 : x
2. Step 2: Convert to fraction form
   19,215/42,075 = 42,075/x
3. Step 3: Cross multiply
   19,215x = 42,075 × 42,075
4. Step 4: Simplify right side
   19,215x = 1,770,305,625
5. Step 5: Solve for x
   x = 1,770,305,625/19,215
6. Step 6: Final answer
   x = 92,131.44