Finding the Third Proportional to 1,189,872 and 1,787,424

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,872 : 1,787,424 = 1,787,424 : x
2. Step 2: Convert to fraction form
   1,189,872/1,787,424 = 1,787,424/x
3. Step 3: Cross multiply
   1,189,872x = 1,787,424 × 1,787,424
4. Step 4: Simplify right side
   1,189,872x = 3,194,884,555,776
5. Step 5: Solve for x
   x = 3,194,884,555,776/1,189,872
6. Step 6: Final answer
   x = 2,685,065.75