Finding the Third Proportional to 19,158 and 40,782

Step by Step Solution

1. Step 1: Write the proportion equation
   19,158 : 40,782 = 40,782 : x
2. Step 2: Convert to fraction form
   19,158/40,782 = 40,782/x
3. Step 3: Cross multiply
   19,158x = 40,782 × 40,782
4. Step 4: Simplify right side
   19,158x = 1,663,171,524
5. Step 5: Solve for x
   x = 1,663,171,524/19,158
6. Step 6: Final answer
   x = 86,813.42