Finding the Third Proportional to 1,223,830 and 1,720,378

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223,830 : 1,720,378 = 1,720,378 : x
2. Step 2: Convert to fraction form
   1,223,830/1,720,378 = 1,720,378/x
3. Step 3: Cross multiply
   1,223,830x = 1,720,378 × 1,720,378
4. Step 4: Simplify right side
   1,223,830x = 2,959,700,462,884
5. Step 5: Solve for x
   x = 2,959,700,462,884/1,223,830
6. Step 6: Final answer
   x = 2,418,391.82