Finding the Third Proportional to 19,692 and 42,840

Step by Step Solution

1. Step 1: Write the proportion equation
   19,692 : 42,840 = 42,840 : x
2. Step 2: Convert to fraction form
   19,692/42,840 = 42,840/x
3. Step 3: Cross multiply
   19,692x = 42,840 × 42,840
4. Step 4: Simplify right side
   19,692x = 1,835,265,600
5. Step 5: Solve for x
   x = 1,835,265,600/19,692
6. Step 6: Final answer
   x = 93,198.54