Finding the Third Proportional to 1,189,863 and 1,787,408

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,863 : 1,787,408 = 1,787,408 : x
2. Step 2: Convert to fraction form
   1,189,863/1,787,408 = 1,787,408/x
3. Step 3: Cross multiply
   1,189,863x = 1,787,408 × 1,787,408
4. Step 4: Simplify right side
   1,189,863x = 3,194,827,358,464
5. Step 5: Solve for x
   x = 3,194,827,358,464/1,189,863
6. Step 6: Final answer
   x = 2,685,037.99