Finding the Third Proportional to 1,217,238 and 1,780,785

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,238 : 1,780,785 = 1,780,785 : x
2. Step 2: Convert to fraction form
   1,217,238/1,780,785 = 1,780,785/x
3. Step 3: Cross multiply
   1,217,238x = 1,780,785 × 1,780,785
4. Step 4: Simplify right side
   1,217,238x = 3,171,195,216,225
5. Step 5: Solve for x
   x = 3,171,195,216,225/1,217,238
6. Step 6: Final answer
   x = 2,605,238.43