Finding the Third Proportional to 3,822,406 and 8,400,146

Step by Step Solution

1. Step 1: Write the proportion equation
   3,822,406 : 8,400,146 = 8,400,146 : x
2. Step 2: Convert to fraction form
   3,822,406/8,400,146 = 8,400,146/x
3. Step 3: Cross multiply
   3,822,406x = 8,400,146 × 8,400,146
4. Step 4: Simplify right side
   3,822,406x = 70,562,452,821,316
5. Step 5: Solve for x
   x = 70,562,452,821,316/3,822,406
6. Step 6: Final answer
   x = 18,460,219.25