Finding the Third Proportional to 19,454 and 40,870

Step by Step Solution

1. Step 1: Write the proportion equation
   19,454 : 40,870 = 40,870 : x
2. Step 2: Convert to fraction form
   19,454/40,870 = 40,870/x
3. Step 3: Cross multiply
   19,454x = 40,870 × 40,870
4. Step 4: Simplify right side
   19,454x = 1,670,356,900
5. Step 5: Solve for x
   x = 1,670,356,900/19,454
6. Step 6: Final answer
   x = 85,861.87