Finding the Third Proportional to 19,745 and 42,289

Step by Step Solution

1. Step 1: Write the proportion equation
   19,745 : 42,289 = 42,289 : x
2. Step 2: Convert to fraction form
   19,745/42,289 = 42,289/x
3. Step 3: Cross multiply
   19,745x = 42,289 × 42,289
4. Step 4: Simplify right side
   19,745x = 1,788,359,521
5. Step 5: Solve for x
   x = 1,788,359,521/19,745
6. Step 6: Final answer
   x = 90,572.78