Finding the Third Proportional to 1,217,262 and 1,780,821

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,262 : 1,780,821 = 1,780,821 : x
2. Step 2: Convert to fraction form
   1,217,262/1,780,821 = 1,780,821/x
3. Step 3: Cross multiply
   1,217,262x = 1,780,821 × 1,780,821
4. Step 4: Simplify right side
   1,217,262x = 3,171,323,434,041
5. Step 5: Solve for x
   x = 3,171,323,434,041/1,217,262
6. Step 6: Final answer
   x = 2,605,292.40