Finding the Third Proportional to 918,112 and 1,988,678

Step by Step Solution

1. Step 1: Write the proportion equation
   918,112 : 1,988,678 = 1,988,678 : x
2. Step 2: Convert to fraction form
   918,112/1,988,678 = 1,988,678/x
3. Step 3: Cross multiply
   918,112x = 1,988,678 × 1,988,678
4. Step 4: Simplify right side
   918,112x = 3,954,840,187,684
5. Step 5: Solve for x
   x = 3,954,840,187,684/918,112
6. Step 6: Final answer
   x = 4,307,579.24