Finding the Third Proportional to 1,178,678 and 1,745,917

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178,678 : 1,745,917 = 1,745,917 : x
2. Step 2: Convert to fraction form
   1,178,678/1,745,917 = 1,745,917/x
3. Step 3: Cross multiply
   1,178,678x = 1,745,917 × 1,745,917
4. Step 4: Simplify right side
   1,178,678x = 3,048,226,170,889
5. Step 5: Solve for x
   x = 3,048,226,170,889/1,178,678
6. Step 6: Final answer
   x = 2,586,139.87