Finding the Third Proportional to 19,683 and 42,477

Step by Step Solution

1. Step 1: Write the proportion equation
   19,683 : 42,477 = 42,477 : x
2. Step 2: Convert to fraction form
   19,683/42,477 = 42,477/x
3. Step 3: Cross multiply
   19,683x = 42,477 × 42,477
4. Step 4: Simplify right side
   19,683x = 1,804,295,529
5. Step 5: Solve for x
   x = 1,804,295,529/19,683
6. Step 6: Final answer
   x = 91,667.71