Finding the Third Proportional to 1,820,218 and 3,972,212

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820,218 : 3,972,212 = 3,972,212 : x
2. Step 2: Convert to fraction form
   1,820,218/3,972,212 = 3,972,212/x
3. Step 3: Cross multiply
   1,820,218x = 3,972,212 × 3,972,212
4. Step 4: Simplify right side
   1,820,218x = 15,778,468,172,944
5. Step 5: Solve for x
   x = 15,778,468,172,944/1,820,218
6. Step 6: Final answer
   x = 8,668,449.70