Finding the Third Proportional to 19,579 and 42,317

Step by Step Solution

1. Step 1: Write the proportion equation
   19,579 : 42,317 = 42,317 : x
2. Step 2: Convert to fraction form
   19,579/42,317 = 42,317/x
3. Step 3: Cross multiply
   19,579x = 42,317 × 42,317
4. Step 4: Simplify right side
   19,579x = 1,790,728,489
5. Step 5: Solve for x
   x = 1,790,728,489/19,579
6. Step 6: Final answer
   x = 91,461.69