Finding the Third Proportional to 1,243,413 and 1,977,218

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,413 : 1,977,218 = 1,977,218 : x
2. Step 2: Convert to fraction form
   1,243,413/1,977,218 = 1,977,218/x
3. Step 3: Cross multiply
   1,243,413x = 1,977,218 × 1,977,218
4. Step 4: Simplify right side
   1,243,413x = 3,909,391,019,524
5. Step 5: Solve for x
   x = 3,909,391,019,524/1,243,413
6. Step 6: Final answer
   x = 3,144,080.86