Finding the Third Proportional to 1,118,640 and 1,678,080

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118,640 : 1,678,080 = 1,678,080 : x
2. Step 2: Convert to fraction form
   1,118,640/1,678,080 = 1,678,080/x
3. Step 3: Cross multiply
   1,118,640x = 1,678,080 × 1,678,080
4. Step 4: Simplify right side
   1,118,640x = 2,815,952,486,400
5. Step 5: Solve for x
   x = 2,815,952,486,400/1,118,640
6. Step 6: Final answer
   x = 2,517,300.01