Finding the Third Proportional to 21,397,940 and 41,724,184

Step by Step Solution

1. Step 1: Write the proportion equation
   21,397,940 : 41,724,184 = 41,724,184 : x
2. Step 2: Convert to fraction form
   21,397,940/41,724,184 = 41,724,184/x
3. Step 3: Cross multiply
   21,397,940x = 41,724,184 × 41,724,184
4. Step 4: Simplify right side
   21,397,940x = 1,740,907,530,465,856
5. Step 5: Solve for x
   x = 1,740,907,530,465,856/21,397,940
6. Step 6: Final answer
   x = 81,358,650.90