Finding the Third Proportional to 642,273 and 1,398,945

Step by Step Solution

1. Step 1: Write the proportion equation
   642,273 : 1,398,945 = 1,398,945 : x
2. Step 2: Convert to fraction form
   642,273/1,398,945 = 1,398,945/x
3. Step 3: Cross multiply
   642,273x = 1,398,945 × 1,398,945
4. Step 4: Simplify right side
   642,273x = 1,957,047,113,025
5. Step 5: Solve for x
   x = 1,957,047,113,025/642,273
6. Step 6: Final answer
   x = 3,047,064.27