Finding the Third Proportional to 1,272,644 and 1,780,180

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272,644 : 1,780,180 = 1,780,180 : x
2. Step 2: Convert to fraction form
   1,272,644/1,780,180 = 1,780,180/x
3. Step 3: Cross multiply
   1,272,644x = 1,780,180 × 1,780,180
4. Step 4: Simplify right side
   1,272,644x = 3,169,040,832,400
5. Step 5: Solve for x
   x = 3,169,040,832,400/1,272,644
6. Step 6: Final answer
   x = 2,490,123.58