Finding the Third Proportional to 1,820,121 and 3,949,636

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820,121 : 3,949,636 = 3,949,636 : x
2. Step 2: Convert to fraction form
   1,820,121/3,949,636 = 3,949,636/x
3. Step 3: Cross multiply
   1,820,121x = 3,949,636 × 3,949,636
4. Step 4: Simplify right side
   1,820,121x = 15,599,624,532,496
5. Step 5: Solve for x
   x = 15,599,624,532,496/1,820,121
6. Step 6: Final answer
   x = 8,570,652.46