Finding the Third Proportional to 1,201,718 and 1,690,311

Step by Step Solution

1. Step 1: Write the proportion equation
   1,201,718 : 1,690,311 = 1,690,311 : x
2. Step 2: Convert to fraction form
   1,201,718/1,690,311 = 1,690,311/x
3. Step 3: Cross multiply
   1,201,718x = 1,690,311 × 1,690,311
4. Step 4: Simplify right side
   1,201,718x = 2,857,151,276,721
5. Step 5: Solve for x
   x = 2,857,151,276,721/1,201,718
6. Step 6: Final answer
   x = 2,377,555.53