Finding the Third Proportional to 678,264 and 1,079,667

Step by Step Solution

1. Step 1: Write the proportion equation
   678,264 : 1,079,667 = 1,079,667 : x
2. Step 2: Convert to fraction form
   678,264/1,079,667 = 1,079,667/x
3. Step 3: Cross multiply
   678,264x = 1,079,667 × 1,079,667
4. Step 4: Simplify right side
   678,264x = 1,165,680,830,889
5. Step 5: Solve for x
   x = 1,165,680,830,889/678,264
6. Step 6: Final answer
   x = 1,718,624.06