Finding the Third Proportional to 19,977 and 42,417

Step by Step Solution

1. Step 1: Write the proportion equation
   19,977 : 42,417 = 42,417 : x
2. Step 2: Convert to fraction form
   19,977/42,417 = 42,417/x
3. Step 3: Cross multiply
   19,977x = 42,417 × 42,417
4. Step 4: Simplify right side
   19,977x = 1,799,201,889
5. Step 5: Solve for x
   x = 1,799,201,889/19,977
6. Step 6: Final answer
   x = 90,063.67