Finding the Third Proportional to 1,226,120 and 1,821,680

Step by Step Solution

1. Step 1: Write the proportion equation
   1,226,120 : 1,821,680 = 1,821,680 : x
2. Step 2: Convert to fraction form
   1,226,120/1,821,680 = 1,821,680/x
3. Step 3: Cross multiply
   1,226,120x = 1,821,680 × 1,821,680
4. Step 4: Simplify right side
   1,226,120x = 3,318,518,022,400
5. Step 5: Solve for x
   x = 3,318,518,022,400/1,226,120
6. Step 6: Final answer
   x = 2,706,519.77