Finding the Third Proportional to 911,678 and 1,977,878

Step by Step Solution

1. Step 1: Write the proportion equation
   911,678 : 1,977,878 = 1,977,878 : x
2. Step 2: Convert to fraction form
   911,678/1,977,878 = 1,977,878/x
3. Step 3: Cross multiply
   911,678x = 1,977,878 × 1,977,878
4. Step 4: Simplify right side
   911,678x = 3,912,001,382,884
5. Step 5: Solve for x
   x = 3,912,001,382,884/911,678
6. Step 6: Final answer
   x = 4,290,990.22