Finding the Third Proportional to 1,217,268 and 1,780,830

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,268 : 1,780,830 = 1,780,830 : x
2. Step 2: Convert to fraction form
   1,217,268/1,780,830 = 1,780,830/x
3. Step 3: Cross multiply
   1,217,268x = 1,780,830 × 1,780,830
4. Step 4: Simplify right side
   1,217,268x = 3,171,355,488,900
5. Step 5: Solve for x
   x = 3,171,355,488,900/1,217,268
6. Step 6: Final answer
   x = 2,605,305.89