Finding the Third Proportional to 1,211,020 and 1,645,394

Step by Step Solution

1. Step 1: Write the proportion equation
   1,211,020 : 1,645,394 = 1,645,394 : x
2. Step 2: Convert to fraction form
   1,211,020/1,645,394 = 1,645,394/x
3. Step 3: Cross multiply
   1,211,020x = 1,645,394 × 1,645,394
4. Step 4: Simplify right side
   1,211,020x = 2,707,321,415,236
5. Step 5: Solve for x
   x = 2,707,321,415,236/1,211,020
6. Step 6: Final answer
   x = 2,235,571.18