Finding the Third Proportional to 1,272,661 and 1,780,197

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272,661 : 1,780,197 = 1,780,197 : x
2. Step 2: Convert to fraction form
   1,272,661/1,780,197 = 1,780,197/x
3. Step 3: Cross multiply
   1,272,661x = 1,780,197 × 1,780,197
4. Step 4: Simplify right side
   1,272,661x = 3,169,101,358,809
5. Step 5: Solve for x
   x = 3,169,101,358,809/1,272,661
6. Step 6: Final answer
   x = 2,490,137.88