Finding the Third Proportional to 1,139,910 and 1,778,878

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,910 : 1,778,878 = 1,778,878 : x
2. Step 2: Convert to fraction form
   1,139,910/1,778,878 = 1,778,878/x
3. Step 3: Cross multiply
   1,139,910x = 1,778,878 × 1,778,878
4. Step 4: Simplify right side
   1,139,910x = 3,164,406,938,884
5. Step 5: Solve for x
   x = 3,164,406,938,884/1,139,910
6. Step 6: Final answer
   x = 2,776,014.72